Wildflower colors tell butterflies how to do their jobs

(PhysOrg.com) -- The recipe for making one species into two requires time and some kind of separation, like being on different islands or something else that discourages gene flow between the two budding species.

Fish out of water: Gene clue to evolutionary step

Two genes controlling a tissue protein may have played a role in the key period when fish shed their fins and became limbed land-lovers, a study published by Nature on Thursday said.

Scientists reveal family tree of 'super-sized lions'

(PhysOrg.com) -- The giant cats that roamed the British Isles, as well as Europe and North America, as recently as 13,000 years ago were lions rather than giant jaguars or tigers, a team led by Oxford University scientists ...

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