New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons on the lunar far side.That's good news for scientists and NASA, which is ...

While genetic tests can reveal the ancestry of enslaved individuals, strontium analysis can now home in on where they actually grew up.

He conquered land across three continents, ruled over states from Egypt to modern-day India, and never lost a battle – before ...