Dark matter, a hypothetical material that does not absorb, emit or reflect light, is thought to account for over 80 percent of the matter in the universe. While many studies have indirectly hinted at its existence, so far, physicists have been unable to directly detect dark matter and thus to confidently determine what it consists of.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/LlHuwJUeO
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