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Science Sunday: Have We Finally Found Dark Matter?

Paul M. Sutter Paul Sutter's Near Futures
Astronomers believe that a mysterious, invisible substance fills up the universe. Known as dark matter, they think it is a new kind of particle. But efforts over decades to find this particle have come up short.

Time’s (Almost) Reversible Arrow

Frank Wilczek Quanta Magazine
The laws of physics work both forward and backward in time. So why does time seem to move in only one direction? One potential answer may also reveal the secrets of the universe’s missing mass.
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