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It's Official, Antimatter Falls Down in Gravity, Not Up

Since the discovery of antimatter decades ago, particle physicists have wondered if these particles were repulsed by gravity. Einstein predicted that despite having opposite charges to its regular matter counterparts, antimatter should still behave like matter does concerning gravity. This has been tricky to confirm experimentally since it’s hard to make enough antimatter to observe its behavior. Particle physicists have finally pulled it off, using the ALPHA-g experiment at CERN, generating antihydrogen atoms and then dropping them in a 3-meter tall vertical shaft.

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Astronomers are Hoping the Event Horizon Telescope saw Pulsars Near the Milky Way's Supermassive Black Hole

The Event Horizon Telescope is a collection of radio telescopes across the globe that simultaneously gathered data about the Milky Way’s supermassive black hole, acting as a single telescope the size of planet Earth. This revealed the galaxy’s heart in unprecedented detail, helping to confirm the black hole’s event horizon and prove some of Einstein’s predictions about General Relativity. But if those observations happened to contain any signals from pulsars in the area, it would allow for even more precise measurements, as if there were atomic clocks orbiting Sgr A*.