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Stephen Hawking – Black Hole Time Travel

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Stephen Hawking explains how we could use the extreme gravity of a black hole to travel to the future. Into The Universe With Stephen Hawking - Time Travel This video belongs to Discovery Communications and is b...

300 Years of FOSSIL FUELS in 300 Seconds

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Fossil fuels have powered human growth and ingenuity for centuries. Now that we're reaching the end of cheap and abundant oil and coal supplies, we're in for an exciting ride. While there's a real risk that we'll fall...

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