How 10 animals evolved their iconic features

Why are whales so big? Why are giraffe's necks so long? Here are the origins of 10 iconic features in the animal kingdom.

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Why does the moon sometimes have a 'halo'?

The moon's halo is always 22 degrees wide in the night sky when it appears. So what causes it?

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2nd tuberculosis outbreak linked to bone grafts in the US

Following two recent outbreaks, health officials have issued new guidance around how to screen donated tissues for tuberculosis.

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$420 off this HP Envy 2-in1 makes it an excellent choice for students

This laptop is perfect for students, and reduced by almost 50%.

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2,500-year-old burials of 3 people discovered in a cave in Mexico

Archaeologists found the remains of two adolescents and one baby in the chamber of a cave, but it's not yet clear how they died.

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Megalodon tooth found on unexplored seamount 10,000 feet below the ocean's surface

A remotely operated submersible was deep in a never-before-studied part of the ocean when it extracted the megalodon tooth.

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'Terror beast' fossils unearthed in Greenland are more than half a billion years old

Enormous for its time period, this newly discovered marine worm likely ruled the seas at the top of the food chain.

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