› added 4 years ago

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TIL about the Alcubierre drive, a solution of Einstein's field equations in general relativity by which a spacecraft could theoretically achieve apparent faster-than-light travel without breaking any physical laws. It would have to be made of matter of negative energy density, which may not exist.

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lolr7 TIL that after Bush Jr. put tariffs on steel imports, what some accused of being a political stunt to get votes from the Rust Belt, the EU threatened to tariff oranges and motorbikes which are big industries in key swing states. Bush responded by dropping the steel tariffs.
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