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All Stories by Liz Kruesi
Health & Medicine
Even a year after recovery back on Earth, astronauts who’d been in space six months or more still had bone loss equal to a decade of aging.
Science & Society
Science grapples with unknown phenomena all the time. Investigating “unidentified flying objects” shouldn't be different, researchers say.
A thin red arc found in an image from the Hubble Space Telescope shows starlight from nearly 13 billion years ago.
New observations from the Event Horizon Telescope reveal the chaotic region around the Milky Way’s central black hole, Sagittarius A*, in extreme detail.