"Arctic ice is melting, sea levels are rising and glaciers are shrinking at alarming rates. The Earth is getting unmistakably warmer. But is this vast potentially catastrophic climate change the result of human behavior? Or is it simply the Earth's natural cycle of warming and cooling periods that have occurred since the planet formed? The History Channel offers an in-depth study of the science behind this controversial hot-button issue" --dvd container....

Investigates the most complex machine of all-- the human body. Explores the vital organs, and examines the instruments of the senses.