Scientists detected the gravitational waves after a pair of unusual black holes collided.
After the attacks on the World Trade Center and the Pentagon, the U.S. launched a “war on terror.” U.S. troops entered Afghanistan, then Iraq. These wars still continue.
A team of academics from around the country joined Brown University’s Watson Institute for International Studies to tally the cost of these wars. They estimate: $2.5 trillion as of today, but that figure could climb to nearly $4 trillion. The group also calculated the human and social costs, both in lives lost and the cost of caring for the nearly 100,000 wounded service members.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.