Massive earthquakes and climate change contributed to human evolution.
Even though a porcupine's quills can scare off fearsome predators, they're nothing compared to the tail weaponry of dinosaurs.
Female turkeys find strutting, making low drumming noises, and males who hang out with their brothers attractive.
Small seahorse and large seahorse pairs are more successful at reproducing than mid-sized seahorses.
Goldfish can survive up to five months in oxygen-less water at the bottom of frozen ponds by turning lactic acid into alcohol-ethanol.
Mexican blind cavefish may have evolved to be asymmetrical.
Scientists are still trying to figure out why ancient lizards evolved into snakes.
Ancient fish that had evolved better eyesight may have hunted like crocodiles.
Have turtles always been able to retract their heads into their shells?
Scientists are studying same-sex termite partnerships.