Scientists detected the gravitational waves after a pair of unusual black holes collided.
How did you sleep last night? If you’re like a lot of Americans, probably not well. The National Academy of Sciences estimates that 50 to 70 million Americans suffer from a chronic disorder of sleep and wakefulness.
And a 2011 poll found that more than half of all Americans from age 13 to 64 experience some kind of sleep problem every night.
Why are so many of us having this problem? Elizabeth Kolbert explores that question, and her own sleeplessness, in the New Yorker’s “Up All Night.”
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.