arstechnica.com

Leonardo da Vinci noted link between gravity and acceleration centuries before Einstein (arstechnica.com)

Engineers re-created one of Leonardo’s experiments with a modern apparatus and found he produced a value for the gravitational constant, G, to around 97 percent accuracy. What makes this finding even more astonishing is that Leonardo achieved this without a means of accurate timekeeping and without the benefit of calculus,...

Something in space has been lighting up every 20 minutes since 1988 (arstechnica.com)

On Wednesday, researchers announced the discovery of a new astronomical enigma. The new object, GPM J1839–10, behaves a bit like a pulsar, sending out regular bursts of radio energy. But the physics that drives pulsars means that they’d stop emitting if they slowed down too much, and almost every pulsar we know of blinks at...

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