Invasive snakes 'hitchhiking' on planes

A team of international scientists has discovered why brown tree snakes have become one of the most successful invasive species.

Big cats in evolutionary arms race with prey: study

Lions and cheetah are faster, stronger and no less agile than their prey, but zebras and impalas compensate with a surprising tactic, researchers said Wednesday: slow down, and keep the big cats guessing.

Ancient DNA offers new view on saber-toothed cats' past

Researchers who've analyzed the complete mitochondrial genomes from ancient samples representing two species of saber-toothed cats have a new take on the animals' history over the last 50,000 years. The data suggest that ...

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