Today’s Atlantic Trivia: Lasers!
Updated with new questions at 3:50 p.m. ET on March 3, 2026.
There’s an old rule of thumb that you retain about 10 percent of what you read, 20 percent of what you hear, 30 percent of what you see via image or video, and so on up the ladder of experiential learning, until you get to a 90 percent retention rate for the things you learn by doing yourself.





























