Science

Former Vice President Al Gore presents an eye-opening and compelling view of the future of our planet - and our civilization - in the MUST-SEE documentary of the year. This is a wake-up call that cuts through myths and misconceptions to deliver the message that global warming is a real and present danger.

Exquisitely simple, yet enormously complex, the egg is one of nature's marvels. This Video Field Trip, produced by PBS39, explains modern egg production, from the development of the egg within the hen, through the packing of washed, sized and graded eggs for sale. The film is suitable for agriculture, family and consumer sciences, economics and science programs as well as other classes.

It was hailed by the New York Times as "surgery of the soul," a groundbreaking medical procedure that promised hope to the most distressed mentally ill patients and their families. But what began as an operation of last resort was soon being performed at some fifty state asylums, often with devastating results.

Which world-famous rock came from outer space? Why were rubies once known as bloodstones?

ROCK & MINERAL shatters the stone's reputation for "rock-solid" permanence. Discover how rocks keep a constantly changing record of our planet's fascinating history, and see how minerals are at the very core of our civilization.

Journey of a Man answers the question, "Where do we all come from?" Today, some six billion people are spread across the planet. But there was a time-not so long ago-when the human species numbered only a few thousand and their world was a single continent: Africa.