Blocks of frozen carbon dioxide sliding down Martian dunes may have carved the planet’s strange gullies, mimicking the work of living creatures.
Sunspot AR3767 erupted with a X1.7-class solar flare, followed by an X1.1-class flare from sunspot AR3780. NASA's Solar ...
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Tiny Fragments From 11-Million-Year-Old Asteroid Strike Make Experts Wonder, ‘Where Is Its Crater?'
The massive asteroid hit the Earth eons ago and left glassy remnants across Southern Australia. But the crater is missing.
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