Recent evidence suggests that 1240 years ago the Earth was bombarded by a massive gamma-ray burst, the most powerful known explosion in the universe. Researchers studying ancient Japanese cedar trees have found unusually high levels of the isotope carbon-14, corresponding with a surge in beryllium-10 in Arctic ice at the same time, which suggest that a powerful flash of cosmic radiation hit our planet in AD 774 or 775... To continue reading, subscribe to Science Recorder today.
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