Three near-identical U.S. lizards have kept their identities for millions of years in a way that researchers compare to the ...

Two new studies into lizard colors reveal how one species maintains its colorful diversity while others are losing their ...

A newly evolved, aggressive “Hulk” wall lizard is spreading out from the Rome region — and researchers are watching a million-year stable system unravel in real time. From three morphs to one: Across ...

From three morphs to one: Across 220 populations, the pattern is consistent: where "Hulk" arrives, yellow and orange throat ...