Scientists are pretty sure the invisible stuff makes up most of the universe’s mass and say we wouldn’t be here without it — but they don’t know what it is. The race to solve this enormous mystery has brought one team to the depths under Lead, South Dakota.
The question for scientists is basic, says Kevin Lesko, a physicist at Lawrence Berkeley National Laboratory. “What is this great place I live in? Right now, 95% of it is a mystery.”
The idea is that a mile of dirt and rock, a giant tank, a second tank and the purest titanium in the world will block nearly all the cosmic rays and particles that zip around — and through — all of us every day. But dark matter particles, scientists think, can avoid all those obstacles. They hope one will fly into the vat of liquid xenon in the inner tank and smash into a xenon nucleus like two balls in a game of pool, revealing its existence in a flash of light seen by a device called “the time projection chamber.”
Scientists announced that the five-year, $60 million search finally got underway two months ago after a delay caused by the COVID-19 pandemic. So far the device has found ... nothing. At least no dark matter.
This story is from the July 15, 2022 edition of AppleMagazine.
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This story is from the July 15, 2022 edition of AppleMagazine.
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