We're used to the fact that space is cold, but our Universe is actually getting hotter. Scientists found that the temperature of a gas in space has gone up more than 10 times in the last 10 billion years. There are many mechanisms that help to heat up the matter in the Universe, and they could go crazy if space warms up. Active stars, colliding galaxies, stellar cataclysms, black holes, neutron stars - the Universe has so many sources of energy. So, will this change in temperature lead to a catastrophe? 

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