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.
Saccorhytus coronarius was an ellipsoid shaped bag, with a big mouth, and was only about a millimeter long. It was also humans' earliest ancestor.
What are the benefits of being a multicellular organism?
Our brains aren't just three times bigger than our ancestor's brains.