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AstronomyThe closest images of the sun ever taken reveal ‘campfire’ flares
The first images from Solar Orbiter, a NASA-European Space Agency spacecraft, show tiny, never-before-seen flares across the sun’s surface.
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ClimateClimate change made Siberia’s heat wave at least 600 times more likely
Siberia’s six-month heat wave during the first half of 2020 would not have happened without human-caused climate change, researchers find.
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SpaceWhat will astronauts need to survive the dangerous journey to Mars?
Going to Mars, astronauts will need protections from microgravity and radiation, plus miniature medical devices to diagnose problems and help handle emergencies.
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CosmologyDespite a new measurement, the debate over the universe’s expansion rages on
The Atacama Cosmology Telescope finds the universe is expanding more slowly than supernova observations suggest.