Moscow/Bologna/Halle. The Tunguska catastrophe in 1908 evidently led to high levels of acid rain. This is the conclusion reached by Russian, Italian and German researchers based on the results of ...
Researchers have heated solid gold to an astonishing 19,000 kelvins (33,740°F), more than 14 times its melting point, without it melting. This unprecedented feat challenges the long-standing "entropy ...
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