Meteor Crater AZ

Asteroid killed off the dinosaurs

04 March 2010

The Cretaceous-Tertiary mass extinction, which wiped out the dinosaurs and more than half of species on Earth, was caused by an asteroid colliding with Earth...

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BUTTERFLY

How the butterflies got their spots

04 February 2010

How two butterfly species have evolved exactly the same striking wing colour and pattern has intrigued biologists since Darwin's day. Now, scientists at Cambridge have...

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