Scientists detected the gravitational waves after a pair of unusual black holes collided.
Residents in the Philadelphia neighborhood of Germantown are trying to make sense of yet another police shooting — the seventh time police have shot a suspect in Philadelphia in the past week.
Four of the shootings have been fatal, including one yesterday. A bullet also grazed a two-year-old boy.
The latest shooting came hours after Philadelphia Police Commissioner Charles Ramsey asked federal investigators to look into the department’s use of force.
New York City and Las Vegas have conducted similar reviews of police practices.
But what has been going on in Philly this week?
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.