The fossilized remains of the mare and her tiny, unborn foal are revealing new insights into reproduction in ancient horses.
A scrappy, furry plant-lover named Luck coexisted with dinosaurs and provides important new insights into the evolution of Earth's earliest mammals.
Hummingbird beaks aren't just for nectar sipping. They can double as weapons in the mating game.
Green anole handles arrival of an invasive competitor by making better toes in a mere 20 generations.
Our ancestor's ability to survive the mass extinction event that wiped out the dinosaurs could have important medical applications that one day could help a manned trip to Mars.
What was the first sexual intercourse like? A new study finds it involved fish and looked a lot like a square dance.
A new study shows how bird wrists evolved from those of their dinosaur predecessors.
Fossilized, primitive amphibians with odd-looking appendages suggest the ability of some vertebrates to regenerate or regrow amputated limbs first evolved at least 300 million years ago.
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