NASA's Hubble Space Telescope revealed the remnants of a huge explosion near the supermassive black hole at the center of our galaxy, just 3.5 million years ago.
In galactic timescales, that's recent. Ancient human ancestors lived across Africa at the time.
Video of an artist's interpretation shows how the explosion produced cones of radiation that reached 200,000 light-years beyond our galaxy.
Researchers say the blast was likely caused by nuclear activity.
The finding suggests the Milky Way is...
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