Season 4Episode 5Runtime unavailable
Moon Smasher/Secrets in the Salt/Bird Brains/Lonnie Thompson
2009-07-280.0 rating
Follow a NASA satellite looking for water on the moon, see what ancient salt deposits reveal about life 250 million years ago, learn how bird brains are remarkably similar to our own, and meet a climatologist who digs for clues to climate change in the world's highest glaciers.