Posts byEric Copenhaver

No fear of the dark

In 1938, a 10-year-old girl named Vera Rubin hated going to sleep. She’d shut off her lights and lean out the window until her parents admonished her to go to sleep. Even then, she’d lay in bed and look out her north-facing window. Vera would watch the stars, and if there was a meteor shower,

How lasers size up the shrinking proton

Update from author (October 2017): New hydrogen spectroscopy results, with terrific precision, were published at long last on October 6. Before these data, all measurements made with hydrogen agreed with each other, but strongly disagreed with muonic hydrogen spectroscopy. Now, the tables have turned. The new spectroscopy is consistent with what looked to be recalcitrant muonic