Scientists detected the gravitational waves after a pair of unusual black holes collided.
The U.S. Secret Service scandal is expanding.
Agents are now alleged to have caroused with prostitutes in El Salvador in 2011, Argentina in 2009, and possibly Moscow in the early 2000s.
The Pentagon is investigating. So are the Senate’s Judiciary and Armed Services committees. And the Committee on Homeland Security and Governmental Affairs is expected to hold hearings next month.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.