It was also around this time that the first plants invaded the land. The earliest shark-like teeth we have come from an Early Devonian (410-million-year-old) fossil belonging to an ancient fish called ...

The timeline of when people arrived ... that the ancestors of Native Americans split from ancient Siberian populations no ...

Maybe they helped each other. Maybe they ran from each other. Maybe they ignored each other. It’s long been known that multiple species of ancient humans lived in the same hot, lush lakeshore area of ...