Video appears to show American Airlines flight’s collision with a US Army helicopter near DC
A grainy snippet of video footage taken in the dark of night, seemingly by an airport CCTV camera, appears to show the fatal ...
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Supermassive black holes in 'little red dot' galaxies are 1,000 times larger than they should be, and astronomers don't know why
"Our measurements imply that the supermassive black hole mass is 10% of the stellar mass in the galaxies we studied." ...