Scientists detected the gravitational waves after a pair of unusual black holes collided.
The zoo in Tripoli hopes to reopen after the revolution that overthrew Colonel Moammar Gadhafi. The zoo was damaged in the intense fighting that took place before the capital fell to the rebel forces. The BBC’s Mark Lowen visited the zoo and has this report.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.