Electrifying time-lapse video shows neurons shooting across the inside of a chick embryo

An striking video of developing neurons won the 2023 Nikon Small World in Motion Video Competition.

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Green-banded broodsac: The brain-hijacking parasite that creates disco zombie snails

This parasitic worm crawls into the eyestalks of snails, takes over its brain then pulsates to make the mollusk look like a dancing caterpillar.

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Space photo of the week: Hubble spies a spectacular galaxy crash

Arp 107 hosts a special spiraling 'Seyfert' galaxy connected to a smaller galaxy by a 'bridge' of dust and gas.

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Why is fish so smelly?

Fish smell is from degrading lipids and bacterial reactions that increase in potency over time.

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Mysterious and 'beautifully carved' life-size camel carvings discovered in Saudi Arabian desert

Life-size carvings of camels have been found in the Saudi Arabian desert, but archaeologists aren't sure who created them and when.

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Prenatal RSV vaccine protects newborns from the virus, CDC says

The CDC recommends a newly approved RSV vaccine be given during the last trimester of pregnancy to protect newborns.

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Scientists investigate mysterious case of orca that swallowed 7 sea otters whole

The female orca was found far from her normal hunting ground with six whole sea otters in its stomach and one lodged between its oral cavity and the esophagus.

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Watch ghostly dumbo octopus swim with its massive 'ears' in rare new footage

On an expedition in Hawaii, a remote underwater vehicle filmed a dumbo octopus swimming with its ear-like fins near the seafloor. The pale white creature is one of the deepest-dwelling octopuses on Earth.

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Woman is 1st to survive infection with deadly 'blackleg' bacteria she caught while gardening bare-handed

A woman survived a rare infection that had previously been reported in only two other humans, both of whom died from the disease.

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After you die, your microbiome cooperates with soil microbes to 'recycle' your body

After you die, bacteria harvest your body for the nutrients that help push daisies.

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The 1st American cowboys may have been enslaved Africans, DNA evidence suggests

DNA from cattle suggests some of the first cowboys in the Americas were enslaved Africans, who herded cows that were brought with them on slave ships.

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Save $150 on the M2 MacBook Air, with extra storage

Save a chunk on the MacBook Air with M2 processor.

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Save big on this excellent Garmin running watch

The Garmin Venu 2 is reduced by almost $140.

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Alien life may evolve from radically different elements than human life did

Radioactive metals and even certain gases may be capable of the kinds of reactions needed to spur life, new research suggests.

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'Very rare' Iron Age arrow with quartzite tip uncovered from melting ice after 3,500 years

Glacial archaeologists in Norway have found an arrow with its quartzite tip still attached after spending up to 3,500 years in the snow and ice.

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Kelping is a 'global phenomenon' sweeping the world of humpback whales, scientists say

Humpback whales may enjoy rolling around in seaweed as a form of play, but "kelping" could also help maintain their skin health by removing parasites and bacteria.

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For 1st time, scientists write words in liquid water

Scientists used a process called 'diffusioosmosis' to write words that lingered in liquid water.

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Major CERN experiment proves antigravity doesn't exist — at least when it comes to antimatter

New research showing that elusive antimatter falls downward toward the Earth proves Albert Einstein right yet again.

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Limited-time deal — save over $100 on the Garmin Forerunner 945 premium running smartwatch

The Garmin Forerunner 945 has dropped below $400 at Amazon. It is lightweight, has excellent battery life, and has a ton of useful features.

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The strange story of sharks that lived in a golf course pond for 20 years — then vanished

In the 1990s, a group of juvenile bull sharks were left stranded in a golf course pond in Australia, where they thrived for decades. Now scientists are trying to understand why.

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How to see the Harvest Moon, the final supermoon of 2023, rise this weekend

The famous Harvest Moon — the final supermoon of 2023 — will be the first full moon of autumn when it rises on Sept. 29.

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'Ritual text' from lost Indo-European language discovered on ancient clay tablet in Turkey

Researchers are still studying the ancient text of an unknown language, written in cuneiform on a clay tablet.

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Rat 'lungworm' that can invade the human brain found in Georgia rodents

A parasitic worm that infects rats has established a new population in Georgia after previously being found in other southeastern states.

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Why are some people's veins 'hard to find'?

From stress to dehydration, there are many reasons why some people's veins may be "hard to find" when they're getting an infusion or blood draw.

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Ancient supernova in James Webb telescope image could help solve one of the universe's biggest mysteries

NASA's James Webb Space Telescope has spotted a distant supernova that appears three times in the same photo. The new observations could help solve one of the universe's biggest inconsistencies.

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India's Chandrayaan-3 moon lander fails to answer wake-up call, may be dead for good

The Indian lunar lander and rover entered hibernation in early September.

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New 'inverse vaccine' could wipe out autoimmune diseases, but more research is needed

An "inverse vaccine," which selectively suppresses the immune system, treated multiple sclerosis in mice. But how well could this new approach work in people?

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COVID drug molnupiravir may be driving the virus to mutate — should we worry?

The antiviral molnupiravir may be shaping the evolution of the virus behind COVID-19, but we still don't know what this means for transmission or the emergence of variants.

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Scientists have figured out when the biggest bull sharks are most active — and it's not when official advice suggests

Researchers tracked more than 200 bull sharks off the coast of New South Wales to find out exactly when they were most active and posed the greatest risk to humans.

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Save $40 on the Jabra Elite 4 Active running headphones at Best Buy

Reduced by 33%, you can get the highly-rated Jabra Elite 4 Active running headphones for just $79.99 at Best Buy.

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What's the highest temperature water can freeze, and the lowest it can boil on Earth?

Ice can form on Earth at temperatures above 32 degrees Fahrenheit (0 degrees Celsius), and water can boil below 212 F (100 C). Here's how.

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NASA's OSIRIS-REx capsule returns to Earth with a sample from the 'potentially hazardous' asteroid Bennu

A capsule containing 2 ounces of rocky material from the "potentially hazardous" asteroid Bennu has landed safely in the Utah desert after a seven-year mission in space.

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Science news this week: Pink diamonds and nuclear 'pasta'

Sept. 24, 2023: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.

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See the 'amazing' facial reconstruction of a Bronze Age woman discovered crouching in a 4,200-year-old grave

The skeletal remains of the 'Upper Largie Woman' were found in a quarry in Scotland. Now, scientists have reconstructed the Bronze Age woman's face.

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Is glass a liquid or a solid?

Glass has unique properties, but is it a solid or a liquid, or does it fall into its own scientific category?

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Pacific lamprey: The jawless fish that survived 4 mass extinctions and sucks prey dry of blood and body fluids

Lampreys belong to an ancient group of fish called Agnatha that evolved 450 million years ago, predating both dinosaurs and trees.

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Space photo of the week: The sun's violent corona like it's never been seen before

The sun's outer atmosphere was captured at previously impossible extreme ultraviolet wavelengths thanks to a last-minute engineering hack.

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What would colors look like on other planets?

Here's how your brain might adjust to see color on another world.

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James Webb telescope finds potential signature of life on Jupiter's icy moon Europa

The discovery of seemingly home-grown carbon dioxide suggests Europa's ice-covered ocean could be habitable.

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Mysterious 'fossilized' bubble 10,000 times the size of the Milky Way could be a relic from the Big Bang

Astronomers have spotted a gigantic void they believe to be a baryon acoustic oscillation — a relic from when the universe was a fiery plasma soup.

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How does water get stuck in your ear — and how do you get it out?

Whether it's from a day at the beach or a trip to the swimming pool, getting water stuck in your ear is very common. But how does it happen?

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Move over, Viagra — this spider's boner-inducing venom could treat people let down by the blue pill

Scientists say a synthetic compound derived from Brazilian wandering spider venom could treat people with erectile dysfunction for whom drugs like Viagra don't work.

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15 places on Earth that look like alien planets

These stunning locations feel out of this world, but are actually right here on Earth.

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What is El Niño?

El Niño is a climate cycle in which waters off the tropical eastern Pacific are warmer than usual, which in turn affects global weather patterns.

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Mercury reaches its highest point in the sky this weekend. Here's how to see it.

A bright, yellowish spot in the morning sky is actually Mercury making a rare daytime appearance. Here's how to see it at its highest and brightest this week.

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2 rare Roman cavalry swords from 1,800 years ago discovered by UK metal detectorist

A metal detectorist unearthed a pair of swords once used by the Roman cavalry.

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Oops! US Space Force may have accidentally punched a hole in the upper atmosphere

A rocket carrying a Space Force surveillance satellite may have created a hole in the ionosphere as it shot into space. The launch was carried out with just 27 hours' notice, which is a new record.

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Save $100 on the Samsung Galaxy Watch5 at Best Buy

This fantastic smartwatch is now under $180 thanks to a hefty discount.

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Palatial 1,500-year-old Maya structure unearthed in Mexico

Archaeologists discovered the palace-like building ahead of railway construction in Mexico's Yucatán Peninsula.

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Nuclear 'pasta' cooked up by dead stars could unravel the secrets of stellar afterlife

In the extreme hearts of neutron stars, fundamental particles are twisted into strange 'pasta' shapes that could reveal untold secrets about how dead stars evolve.

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This fantastic Amazfit fitness tracker is under $140 at Amazon

This Amazfit GTR 3 Pro fitness tracker is reduced by $50 at Amazon.

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Watch: NASA spacecraft flies through a violent solar explosion for 1st time ever — and survives unscathed

NASA's Parker Solar Probe plunged through a hellish coronal mass ejection (CME) to capture its mysterious swirlings on film.

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See the stunning facial approximation of a medieval man with dwarfism

Researchers used 3D scans of a medieval man's skull to recreate a facial approximation of what he may have looked like when he was alive centuries ago.

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'Grand cosmic fireworks': See the stunning winners of the 2023 astronomy photo of the year contest

The winning images from the Royal Observatory Greenwich's 15th annual astrophotography contest will blow you away.

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Indian crocodiles seen saving dog from feral pack attack, but scientists divided over what it means

Crocodiles appeared to rescue a dog that had been chased into a river, and scientists said this unusual behavior could indicate empathy — but others are skeptical.

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Paleolithic 'art sanctuary' in Spain contains more than 110 prehistoric cave paintings

Cave paintings and engravings dating to at least 24,000 years ago were discovered near Valencia in Spain.

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Earth's biggest cache of pink diamonds formed in the breakup of the 1st supercontinent 'Nuna'

The Argyle formation in Australia, which hosts 90% of the world's pink diamonds, formed when the first supercontinent broke up.

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Knife blade lodged in a man's belly mysteriously 'floated' to the other side of his body without causing damage

Doctors report an "unusual and spectacular injury" in which a knife blade lodged in a man's belly drifted through his abdomen.

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Some Patients Who 'Died' but Survived Report Lucid 'Near-Death Experiences,' a New Study Shows

In some cardiac arrest patients, a flurry of brain activity during life-saving CPR may be a sign of a "near-death experience"

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Mysterious source of water on the moon traced to Earth's magnetic shield

Some of the moon's surface water may have an Earthly origin, due to high-energy interactions between the sun and Earth's magnetic shield, new research suggests.

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Watch slime-covered penis mushroom that smells like rotting flesh grow and decay in mesmerizing timelapse

A video of a stinkhorn fungus — a 10-inch penis-shaped mushroom — bursting from the ground, growing and decaying has been captured in a forest in Germany.

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Early medieval warrior found buried with his weapons in Germany

Archaeologists think the man died during the Merovingian period, an early stage of the Germanic-speaking empire of the Franks.

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Watch elusive, sucker-less squid in rare footage captured off the Galapagos

Footage of the rare squid, Grimalditeuthis bonplandi, was captured for only the 2nd time ever during an expedition to explore hydrothermal vents off the Galapagos Islands.

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'Modest, humble, and uncommonly smart': How a Soviet mathematician quietly solved the mystery of planet formation

In the 1950s, Viktor Safronov, a young Soviet mathematician, was tasked with solving the problem of how the solar system's planets were formed. A decade later he had the answer — but it was largely ignored until an American graduate student passed Safronov's ideas on to NASA.

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'Outstanding' 2,200-year-old child's shoe discovered deep underground in Austrian mine

A second century B.C. leather shoe found in an Austrian mine offers 'extremely rare insight into the life of Iron Age miners.'

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14th-century shipboard cannon that fired 'stone shots' may be Europe's oldest on record

An analysis of cloth found inside the cannon suggests that it dates to the 14th century and that the weapon was charged with gunpowder and ready to fire.

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How accurate are our first childhood memories?

Can we trust our earliest memories, or are they unreliable?

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Science news this week: A giant gator and a wobbly asteroid

Sept. 17, 2023: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.

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How far apart are stars?

Scientists have calculated the average distance between stars, but there's much more to star distribution than meets the eye.

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How wealthy UFO fans helped fuel fringe beliefs

There is a long U.S. legacy of plutocrat-funded pseudoscience. Congress just embraced it.

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Why do some people think cilantro tastes like soap?

Here's the science behind why some people hate eating cilantro, which is also known as coriander.

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Is this the last M1 iPad Air discount?

Apple's best student tablet is discounted again at B&H Photo.

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Blood transfusions might transfer proteins involved in brain hemorrhage — but it would be incredibly rare

The risk of a rare type of brain hemorrhage may be transmissible, though the absolute risk is very low.

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Internet

Everything you need to know about the World Wide Web with the latest internet news, features and articles.

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'This is complete nonsense': Scientists rail against 'alien' bodies shown before Mexican congress

Scientists blast claims of two 'alien' bodies that a journalist presented to Mexico's congress.

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Universe's 'cosmological collider' lands 3 scientists $100,000 physics prize

Mikhail Ivanov, Oliver Philcox, and Marko Simonović won the New Horizons Award for their work on large scale structures — the strands and filaments of our universe which contain buried clues to its most fundamental properties.

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Human elbows and shoulders evolved as 'brakes' for climbing ape ancestors

Researchers studied chimpanzee and monkey anatomy to better understand how humans evolved to have flexible shoulders and elbows.

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World's 1st mountaintop impact crater discovered in northeastern China

A two-peaked mountain in northeastern China is the site of the world's first confirmed mountaintop crater.

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Rare polar ring galaxy is 'one of the most spectacular' astronomers have ever seen

Astronomers discovered an ultra-rare spiral galaxy with a ring of hydrogen swirling around its poles.

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Engineering

Explore the branch of science and technology that's all about building things and solving problems with the latest engineering news, features and articles.

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Asteroid that collided with NASA spacecraft is behaving unexpectedly, high school class discovers

Asteroid Dimorphos, which NASA intentionally hit with a rocket during its DART mission in September 2022, is behaving in unpredicted ways.

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Team Egg or Team Sponge? Scientists divided over identity of mysterious golden orb from bottom of ocean

The weird gold dome-shaped object was found during an NOAA expedition to the Gulf of Mexico and is now being preserved in ethanol until it can be sent for laboratory analysis.

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1st of its kind footage shows guard dogs saving sheep from puma attack on a pitch black mountain

The footage of a puma hunting sheep was captured with thermal imaging cameras in the Patagonian wilderness as part of a new National Geographic show.

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Save 27% with the Sunny Health and Fitness Bike, now under $300!

The Sunny Health and Fitness bike has been reduced by 27% on Amazon. It looks like a typical spinning bike at the gym, and is extremely quiet and sturdy.

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What happens to cancer cells after they're killed by treatments?

Cancer treatments aim to kill tumor cells, and the immune system is tasked with getting rid of the resulting corpses.

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Who were the first farmers?

Farming fundamentally altered the way humans live, eventually changing people from nomadic hunter-gatherers to sedentary city-dwellers.

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'I am horrified': Archaeologists are fuming over ancient human relative remains sent to edge of space

Scientists are calling the Virgin Galactic mission that carried the bones of Australopithecus sediba and Homo naledi to the edge of space a major ethical breach.

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'Once again, innovation and proliferation ended with catastrophe': The environmental disaster of plants taking over the world

The evolutionary leap that allowed plants to live on land 400 million years ago upended Earth in a way unseen since the Great Oxidation Event over 1.5 billion years earlier.

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7,000-year-old animal bones, human remains found in enigmatic stone structure in Arabia

Researchers have discovered human bones and animal remains dating to around 7,000 years ago in Arabian stone structures known as mustatils.

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Green comet Nishimura will reach closest point to Earth today, and it won't be back for another 430 years

The comet Nishimura, which was only discovered in August, will soon be slingshotted around the sun and back out toward the edge of the solar system where it will remain for centuries.

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Panasonic Lumix S5 IIX review

If video is important to you, look no further than the Panasonic Lumix S5 IIX — which is arguably Panasonic's greatest camera ever.

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Mysterious bamboo regeneration baffles scientists ahead of once-in-a-century blooming event

Henon bamboo flowers only once every 120 years then vanishes for years, and researchers have no idea how it regenerates.

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James Webb telescope could detect life on Earth from across the galaxy, new study suggests

Researchers have shown that if the James Webb Space Telescope was pointed at Earth from a distant star, it could detect the signatures of intelligent life in our planet's atmosphere.

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Here's why Morocco's quake was so deadly — and what we can do for the next one

More than 2,500 people died when a powerful magnitude 6.8 earthquake struck Morocco on Sept. 8.

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Dolly the sheep clone creator Ian Wilmut dies at 79

Sir Ian Wilmut was key to the successful creation of Dolly, the first mammal to be cloned from an adult cell, in 1996.

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Apple Watch Series 8 gets $90 discount ahead of Series 9 announcement

Save big on the Apple Watch Series 8 at Amazon while stocks last.

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Divers recover US airman's remains from WWII bomber wreck near Malta

The remains have been identified as those of a gunner killed when the badly damaged aircraft crashed into the sea in 1943.

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NASA is hunting for life outside the solar system. Here's how.

"We aren’t going to see little green men but rather spectral signatures of these key chemicals, or what we call biosignatures."

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Science news this week: Burping black holes and radioactive wild boars

Sept. 8, 2023: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.

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Space photo of the week: Gargantuan sunspots photobomb the world's largest telescope

Two planet-sized sunspots peer out from behind what will be the world's largest telescope, currently being built on a mountaintop in Chile.

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Which animal has the shortest life span?

Mayflies are famous for cramming an entire life into a single day, but that's not strictly true.

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Watch bear and wolf attack moose mom and calf at same time in rare, remarkable footage

In camera trap footage captured in the Alaskan wilderness, the moose appears to try to fight off the bear, as the wolf goes after the calf.

via Livescience https://ift.tt/1woRXUN

Hoff crab: The hairy-chested crustacean that farms bacteria on its hairs

The "yeti" crab is white and hairy, as its nickname suggests, and it thrives in hydrothermal vents in Antarctica's frigid waters.

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How fast is a bullet?

The answer depends on the design of the bullet and the gun, as well as on what happens once the bullet leaves the muzzle.

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5 asteroids will skim past Earth over the next 2 days, NASA says

The five asteroids range from plane to bus-size, and one is expected to come to within half a million miles of Earth.

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Moment falcon digs its talons into pelican's head to protect its nest captured in incredible photo

The winner of the Bird Photographer of the Year was Jack Zhi, who caught the moment a peregrine falcon took on a large brown pelican.

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Anatolian fault that gave rise to deadly Turkey and Syria quakes formed 5 million years ago

A new study traces the birth of a tectonic plate.

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Lost 'rainbow cup' coin minted by Celts 2,000 years ago discovered in Germany

Legend has it that "rainbow cups" are drops of gold that fall to Earth at the end of a rainbow.

via Livescience https://ift.tt/oNbk2Ht

Blood clot risk linked to taking common painkillers alongside certain hormonal birth control

Using NSAIDs and hormonal birth control together increased the overall risk of blood clots in women in the study, but the researchers stressed that the overall risk is still low.

via Livescience https://ift.tt/oDvwgun

'It is biological in origin': 1st analysis of weird golden orb from ocean floor leaves scientists stumped

The golden, dome-shaped object was discovered in the Gulf of Alaska during an NOAA expedition and after bringing it to the surface, scientists still have no idea what it is.

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Move over, python — this tiny snake holds the record for swallowing the largest prey whole relative to body size

The Gans' egg-eater, an African snake, can swallow eggs whole despite its small size.

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How many planets are in the universe?

We currently know of 5,502 planets beyond the solar system, but we've only found the tiniest fraction of the planets astronomers think lie elsewhere in the universe.

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Most advanced lab-made human embryo models look like the real thing

New models of human embryos grown in the lab closely mimic the structure of actual embryos.

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Mysterious 17th-century 'cauldron' may be primitive submarine used to salvage treasure from a sunken galleon

The object was found on the seafloor off Florida, near the wreck of a Spanish treasure galleon.

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Used coffee grounds make concrete 30% stronger

Used coffee grounds that are heat treated increase the compression strength of concrete.

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Apple has cut the prices of iPads for school season

Save on iPad Pro and the tenth-generation iPad at Amazon.

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Tropical Storm Lee could become an 'extremely dangerous major hurricane' by this weekend

Forecasters are keeping an eye on Tropical Storm Lee, which they predict could soon become a full-blown hurricane in the Atlantic Ocean.

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Enormous fireball meteor turns the sky over Turkey green in eerie viral video

A stunning bright-green fireball was captured by a phone camera in a playground in Turkey.

via Livescience https://ift.tt/Q0rZO5c

NASA may have unknowingly found and killed alien life on Mars 50 years ago, scientist claims

One researcher hypothesizes that experiments carried out by NASA's Viking landers in 1976 could have inadvertently killed microbes living in Martian rocks. Other experts are skeptical.

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Save $200 with this Peloton Bike deal.

The Peloton Bike is reduced by $200 at Amazon. It’s beautifully designed and is a game-changer for those who struggle with workout motivation.

via Livescience https://ift.tt/poZNvUa

Bronze Age girl buried with more than 150 animal ankle bones, potentially to help her to the next world

Archaeologists in Kazakhstan have unearthed a burial mound of a Bronze Age girl surrounded by a variety of grave goods.

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Centuries-old technique reveals hidden '3D' animals in Paleolithic cave art

The hidden animals were revealed on cave walls in Spain with 'Magic Eye'-style techniques.

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Grizzly bear filmed brutally mauling black bear in rare footage

A series of videos taken on a roadside in Canada show a grizzly bear attempting to drag a dead black bear up a hill as it bites and mauls the corpse.

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purOxygen P500 review

It may be boxy in design, but the purOxygen P50 offers advanced four-stage filtration — find out how we got on with it in our at-home testing.

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Blue Pure 511 review

Affordable and compact, the Blue Pure 511 is a modest air purifier that pleasantly surprises without overwhelming.

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10 times humans messed with nature and it backfired

History is peppered with times when our patchy knowledge of natural systems has led to questionable interventions with unintended — and sometimes disastrous — consequences.

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Get the best portable MacBook for $200 off at Amazon

Get the best portable MacBook for $200 off at Amazon

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Genetically engineered pink pineapples are flying off shelves: What gives them their distinctive color?

The food giant Del Monte has created a genetically engineered pink pineapple that owes its rosy hue to higher concentrations of a pigment called lycopene.

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Infant's dark-brown eyes suddenly turn indigo blue after COVID-19 antiviral treatment. But why?

In a rare case, the brown eyes of a 6-month-old boy with COVID-19 turned blue after he was given the antiviral favipiravir.

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Scientists finally figure out why cats are obsessed with tuna

Cats love tuna because it contains high concentrations of chemicals that make its umami taste receptors light up.

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15 jaw-dropping spacewalk images

Fearless astronauts push the limits in these epic spacewalk photos.

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Save $100 on the best iPad for students

This fantastic tablet has had its price slashed again.

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Hot weather could boost aggression — but only in certain conditions

Under some circumstances, people may become more aggressive when they're overheated. But other decision-making doesn't seem to be affected.

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What is the most colorful animal on Earth?

Neon green, ultraviolet, rainbows — the variety of colors animals can make seem endless.

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When should you get a flu shot? What to know for the 2023-2024 flu season

When should you get a flu shot, and which shot should people with egg allergies get? Here's CDC guidance for the 2023-2024 flu season.

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Could a star ever become a planet?

Most scientists say a star can never become a planet, but the boundaries between these stellar objects can sometimes be murky.

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Space photo of the week: James Webb sees the Whirlpool Galaxy in a new light

James Webb Space Telescope shows new star clusters forming in one of the best-looking "grand-design" spiral galaxies in the night sky.

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How do mirages work?

What are mirages and why does this optical phenomenon cause us to see reality differently?

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'Doubly magic' form of oxygen may challenge a fundamental law of physics

After scientists created oxygen-28 in the lab, it almost immediately degraded, baffling physicists around the world.

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Will El Niño end the Southwest's megadrought?

El Niño is set to collide with a megadrought in the Southwest. Will the pattern of wet, warmer weather in the Pacific help end the drought?

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Sex between space tourists is inevitable — are we ready for the 1st babies conceived off-planet?

There is a significant chance that the launch of the space tourism sector may be swiftly followed by the first sex in space, and we haven't fully considered the consequences.

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What are the most polluted cities in the world?

Cities like Lahore, Pakistan, Hotan China and Delhi, India have consistently poor air quality, but it's impossible to accurately identify the city with the world's worst air pollution.

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Why are humans good long distance runners?

Walking upright has allowed us to become some of the best distance runners in the world, but at the expense of speed.

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