How the Universe Works : Secret History of Mercury
Show: How the Universe Works
Episode Name: Secret History of Mercury
Season: 6
Episode Nr: 6
Guest Stars ''
Overview 'Mercury is a deadly world, facing attacks from the sun, comets, and other planets, and even though it\'s the smallest planet in the solar system, it has a dangerous secret a dangerous secret that might one day threaten life on Earth.'
Air Date 0000-00-00

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