Physicists have good reason to believe 85 percent of the matter in the universe is currently undetectable. But not being able to see it didn’t keep students at the 42nd SLAC Summer Institute from learning about it.
Last year, a monster magnet set out from Brookhaven National Lab on an epic trek by land and sea to Fermilab, where it will serve as the heart of a search for evidence of new subatomic particles. Last month, researchers...