Ancient DNA is telling us more and more about humans and environments long past. Could it also help rescue the future?

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 ...