PBS Space Time

11 Season
395 Episode

PBS Space Time - Season 2020 Episode 19 Does Gravity Require Extra Dimensions?


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48 minutes 2024 HD

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It’s been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire. The fundamental nature of gravity still eludes our best minds - but those secrets may be revealed by turning back to the Cavendish experiment. That steampunk contraption may even reveal the existence of extra dimensions of space.

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