As the Big Bang theory goes, somewhere around 13.8 billion years ago the universe exploded into being, as an infinitely small, compact fireball of matter that cooled as it expanded, triggering reactions that cooked up the first stars and galaxies, and all the forms of matter that we see (and are) today.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/2qD504z
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