Without protective fur to safeguard against sun damage, our ancestors went from pale-skinned to dark-skinned.
The discovery of the earliest-known human footprints outside Africa leads to a big question: How does carbon dating work? Trace is here to tell you all about carbon dating and other ways we can know the age of an object or fossil.
Strange, elongated skulls found in South America are spawning theories about unknown humans and aliens. But why?
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.
The earliest known population of humans outside of Africa has been found, with huge implications that could erase species from the human family tree.
Are humans are still evolving? Would you take a ride on the Titanic II? Did you read the documents decoded from an al Qaeda porn video? Get it all in This Week in Discovery News!