The journey of human ancestors from Africa to other parts of the world has long fascinated scientists. Recent evidence from Romania suggests this migration began earlier than previously believed.

While the first Homo sapiens became lunch for a saber-toothed cat, the second created a memory that, over thousands of years, became part of the species' DNA. Even though saber-toothed cats no ...

They've evolved at least five times in mammals, most notably in the saber-tooth cat Smilodon, who sported serrated sabers that could measure nearly one foot long. But behind the fearsome ...

They've evolved at least five times in mammals, most notably in the saber-tooth cat Smilodon, who sported serrated sabers that could measure nearly one foot long. But behind the fearsome appearance of ...