Charles Darwin and the Tree of Life

Buried beneath the sand for seven million years, a skull is unearthed in Chad that may provide evidence of the oldest known human ancestor.

A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwide.

When Harvard PhD student Jennifer Brea is struck down at 28 by a fever that leaves her bedridden, doctors tell her it’s "all in her head."...

In Astronomy Part 2, you will learn all about the planets, asteroids, comets, meteoroids, the layers of the sun, fusion, and more. The Standard...

This series also covers the essential concepts of astronomy: gravity, the light spectrum, Earth's magnetic field, the solar system, the sun, Kepler's...

Physics is a system of models of nature according to which all phenomena are explained in terms of matter and force. Sound confusing? It doesn't have...

Sniper: Bulletproof deconstructs and analyzes the little-known sniper events that have occurred when no other course of action was possible. The...

There are endless gruesome ways that the world could end; through nasty, natural disasters or because of some man-made abomination. From maniac...

Although first glance reveals little more than stones and sand, the desert is alive. Witness moving rocks, spitting mud pots, gorgeous flowers and...

Jurassic Cash is a documentary on the new business of dinosaur fossils, an incredible speculation in the auction world… And on the footsteps...

The taped performance of Henry Fonda's one-man show was aired as "IBM Presents Clarence Darrow" on September 4, 1974, on NBC.

This film consists of three parts. The first dramatizes the life of the founder of Soviet astronautics, Konstantin Tsiolkovsky; the second describes...