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World Denmark's grand Fourth of July party goes on, with the US conspicuously absentSports Tuchel tells young England fans to stay up for a 1am World Cup date with MexicoBusiness Kuaishou shares slip as Tencent-backed billions pour into its AI video unit KlingScience A puzzling LIGO signal hints at black holes from the dawn of timeBusiness Oil edges up in thin trade before the US holiday as tensions easeSports DR Congo's fans savor a historic World Cup run, 52 years in the makingScience Bumble bees pass a classic animal-intelligence test, surprising scientistsTechnology Australia says AI can't train on creators' work for free, fueling a global fightWorld Denmark's grand Fourth of July party goes on, with the US conspicuously absentSports Tuchel tells young England fans to stay up for a 1am World Cup date with MexicoBusiness Kuaishou shares slip as Tencent-backed billions pour into its AI video unit KlingScience A puzzling LIGO signal hints at black holes from the dawn of timeBusiness Oil edges up in thin trade before the US holiday as tensions easeSports DR Congo's fans savor a historic World Cup run, 52 years in the makingScience Bumble bees pass a classic animal-intelligence test, surprising scientistsTechnology Australia says AI can't train on creators' work for free, fueling a global fight

Topic: ligo

The LIGO gravitational-wave observatory at Hanford, Washington (file photograph)
Science
Friday, 7/3, 04:22 AM

A puzzling LIGO signal hints at black holes from the dawn of time

  • A gravitational-wave detector picked up a signal that, if real, involved a black hole too small to have formed from a dying star.
  • Physicists say the intriguing possibility is a 'primordial' black hole born in the first instant of the universe — a candidate for the dark matter that makes up most of the cosmos.
  • But they stress it is a tentative interpretation, not a discovery, and may yet turn out to be noise.

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