Scientists detected the gravitational waves after a pair of unusual black holes collided.
Rebel fighters are claiming that NATO airstrikes blasted their forces today in an apparent mistake that sharply escalated anger about coordination with the military alliance in efforts to cripple Libyan forces.
The Associated Press reports that at least two are dead and a dozen hurt, in what would be the second accidental NATO strike against rebels in a week. The BBC’s Wyre Davis reports.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.