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TIL The 1877 novel Black Beauty was a watershed for the recognition of animal cruelty, especially horses, as an important issue. It spurred reforms in both the US and England, leading to the abolishment of the “bearing rein”- a cruel Victorian device that severely damaged the necks of horses.

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6EQeQ Matter tells space how to curve, and curved space tells matter how to move. That's the basic principle behind Einstein's General Relativity, which linked, for the first time, the phenomenon of gravity with that of spacetime and relativity. Place a mass down anywhere in the Universe, and the space around it will curve in response. But if you take that mass away, or move it elsewhere, what causes the spacetime to "snap back" to its unbent position?
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