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Scientists detect the most powerful cosmic rays ever — and their unknown source could be close to Earth
Credit: Mark Garlick/Science Photo Library via Alamy Scientists have detected the most energetic cosmic rays ever discovered, ...
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Minerals and Gems
Photograph by blickwinkel/Alamy Rocks themselves are made of clusters ... Diamonds, made of carbon atoms, are the hardest natural substance found on Earth. Formed under extremely high pressure ...