Matter - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/matter/
WebOct 19, 2023 · Matter is any substance that has mass and takes up space. Earth, and everything on it, is made of matter, so are all the stars and planets in the universe. According to the Big Bang theory, at the beginning of the universe, all matter erupted from a singularity, a hot, dense speck of matter.
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