Evolution

At last, butterflies get a bigger, better evolutionary tree

For hundreds of years, butterfly collecting has often inspired a special kind of fanaticism, spurring lengthy expeditions, sparking rivalries and prompting some collectors to risk their fortunes and skins in their quest for the next elusive specimen....
yellow-bellied sea snake

Why are there no sea snakes in the Atlantic?

Sea snakes are an evolutionary success story. With about 70 species, they’re the most diverse reptile group in the ocean, outnumbering sea turtle species 10-to-1. They sport a range of physical adaptations for life at sea, including a flattened oa...