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.
Figs seem simple, but they're much more complicated than they appear.
Leaf cutter ants have been fungus farming for millions of years.