Gamma rays are invisible and ultra-powerful forms of light. They are the most energetic source of radiation known in the ...
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Cosmic events happening right now that began before Earth existed
White dwarfs are the leftover cores of stars that died long ago, some before Earth formed. Once created, they simply cool ...
Almost 13,000 years ago, North America underwent drastic changes at a rapid rate. Mammoths, mastodons, giant ground sloths, ...
NASA’s Chandra Observatory reveals a 25-year time-lapse of Kepler’s Supernova Remnant. Glowing debris expands at different ...
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