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PBS Space Time
What If Alien Life Were Silcon-Based?
Season 9
Episode 3
Life as we know it is carbon-based, but does it have to be this way? There’s another element on the periodic table that shares some of the key properties of carbon but is far more abundant on most planets. I’m talking about silicon. So is there silicon-based life out there?
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Gödel found a time-travel solution in General Relativity, revealing spacetime can loop on itself.
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18:18
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19:02
The universe expands faster. “Dark energy” may not be constant after all.
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There’s a new generation of experiments that may unlock the gravity particle.