Without protective fur to safeguard against sun damage, our ancestors went from pale-skinned to dark-skinned.
Mothers produce breast milk that differs depending on the baby's gender, new research shows. Continue reading →
Strange, elongated skulls found in South America are spawning theories about unknown humans and aliens. But why?
We aren't likely to see quintuple jumps in Olympic figure skating soon because the human body just can't spin any more times in midair.
From humans to monkeys to lizards to frogs, every known species, both living and extinct, with a jaw and a backbone has paired limbs! Trace discusses how our stomachs could be the reason why many species evolved into creatures with four appendages.
If you think about it, skeletons aren't awesome. Instead of the super strong shells or exoskeletons so many other animals have, we have internal skeletons that leave us highly vulnerable. But it turns out our skeletons are an evolutionary advantage.