The Best Episodes of How the Universe Works Season 4

Huge magnetic bubbles millions of miles wide; strange invisible matter, and a death star tearing through bands of icy comets, flinging them into violent orbits.

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An examination of Venus; and what it may indicate about Earth's future.

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Beneath the hood of your car lies the history of the Universe. The iron in your chassis, the gold in your stereo and the copper in your electronics all owe their existence to violent cosmic events that took place billions of years ago.

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A look inside the supermassive black hole in the center of the Milky Way to discover terrifying secrets about parallel universes, wormholes, and space-time.

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Discovering how life on Earth came to be; the possibility that life on Earth come from another planet.

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The incredible secrets of the moon are revealed; the moon might be responsible for life on Earth.

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For years, scientists suspected that the oceans came from molecules delivered to Earth from distant stars by asteroids, but a new discovery suggests that their true origins may be more exotic.

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Scientists attempt to understand how this strange force of magnetism works.

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