Today’s Big Question: How do scientists measure the speed of light?

MTV Unplugged—the long-running show featuring stripped-down arrangements from popular musicians—wasn’t quite as mellow behind the scenes as the acts might have suggested. For its 27th anniversary, here are 17 facts about the revealing acoustic series.

Richard Nixon once aspired to be a rapper. Yes, that Richard Nixon.

Let quotes from artists like Vincent van Gogh and Diane Arbus get you through the day.

A team of researchers has discovered that invasive plants are turning yellow woodpeckers red.

We talked to a few previous Jeopardy! winners about betting on Daily Doubles, learning how to time the buzzer, and surviving awkward small talk with Alex Trebek. Here are their behind-the-scenes secrets.