Uncover stunning facts, wild theories and compelling conclusions unearthed by pioneering investigators of human origins over a century and a half of tireless research.

99% of all animal and sea creatures who ever lived have become extinct. Meet some of the most bizarre, including a strange amalgam of bird and sloth, a 7-foot shrimp, saber-toothed cats, mastodons and wooly rhinoceros.

At the edge of Europe, scientists have discovered evidence that the Neanderthals hung on for thousands of years longer than previously believed. Join us as we reveal the final story of their last years on earth.

Discover the thrilling story of life on earth in prehistoric times, when early humans were just starting to inhabit North America and huge climate fluctuations caused a mini Ice Age. How did man survive?

Euope, 25,000 B.C. Arctic glaciers reach as far south as London. Massive predators are on the prowl. Across the continent, two species of primitive man -- the Neanderthals and the Cro-Magnon -- struggle to survive.

Carved from single boulders of basalt, the giant stone heads of the Olmec have mystified archaeologists for more than 150 years. Explore how a primitive civilization moved mountains to make these monumental works of art.