About 178 species including the woolly mammoth and the saber-toothed cat disappeared tens of thousand of years ago. What brought about their demise?
The same brain hormone affects feelings and behaviors in both chimps and humans, causing humans and chimps to share a variety of traits.
It's not a flattering likeness, but rats and humans actually have a lot in common, including physiology.
You probably already know that humans are warm-blooded, while creatures like snakes are cold-blooded. Scientists prefer the terms endothermic and ectothermic.
Why are diseases like cancer so common in humans but so rare in chimps?
Humans yawn when sleepy to stay alert. But imagine yawning when you're already stimulated.
Want to improve your groove when it comes to the Funky Chicken or the Electric Slide? Maybe you could take a lesson from the birds.
Learn about the many animals that have mastered food caching!
One theory as to why humans began walking upright notes that when our species was just getting its start, the ability to reach up for fruit was beneficial.
Humans are more highly "evolved" than chimps, right?