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Archives: May 21, 2020

May 21 is celebrated all over the world – International Space Day! (photo)

С Днём космоса, друзья!

According to Einstein’s theory of relativity – the Universe has arisen from a certain point with a very high density and an infinite amount of energy – the Big Bang. There are other theories, but at the moment there is no way to test any of them. Astrophysicists believe that the universe is the same […]