Discovery Channel - Earth Collection (2012) Part 7 If We Had No Moon

Earth Collection

An amazing Earth DVD collection will let you in on the secrets of the moon, the sun and the Earth. And everything in between. Join scientists and explorers as they cover every facet of our planet and beyond. The Earth series DVDs are a two-disc set of fascinating landscapes, human and animal life and much more.

Part 7: If We Had No Moon

Without the moon, we wouldn't exist. Life, if it had started at all, would be in the earliest stages of evolution. Days would last four hours, winds would blow at hurricane-force and there'd be a dense and toxic atmosphere resembling the runaway greenhouse effect of hell-like Venus. What luck that 50 million years after the formation of the solar system, our proto-planet is smacked by a planetesimals more than twice the size of Mars. From that mother-of-all impacts is born the Moon. It is born in less than a year from debris blasted into orbit — an enormous object in the sky, just 14 thousand miles away, 17 times closer than today. What was the earth like before this? What would the earth be like if the moon went away? What would it be like, “If We Had No Moon?” Narrated By Patrick Stewart.

Discovery Store