Meanwhile, the American lion, which was even larger than African lions and saber-toothed tigers, lurked throughout North America and possibly parts of South America.

Make General Grievous proud by adding one of the best lightsabers to your collection — check out the pros, cons and specs of the top options on the market.

The serious mammoth, naive sloth, and cunning saber-toothed tiger first came together to deliver a human baby back to its family during the Ice Age.

All about dinosaurs. Read about dinosaur discoveries including gigantic meat-eating dinosaurs, earliest dinosaurs and more. Dinosaur pictures and articles.