Cold Doesn’t Exist (And 4 Other Things Scientists Used to Think Were Real)

To explain how the world works, scientists occasionally have an idea that — upon further testing — turns out to be wrong. From rays that carry coldness instead of heat, to a neighboring star that causes regular mass extinctions on Earth, here are 5 things that some natural philosophers and scientists thought could be real.

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Sources: https://docs.google.com/docume....nt/u/1/d/e/2PACX-1vT