Scientists detected the gravitational waves after a pair of unusual black holes collided.
The American Society of Civil Engineers recommends that the United States spend $17 billion a year on bridge maintenance, much more than the $10.5 billion actually spent.
Increasing the federal gas tax, privatizing roads and boosting fees for driving during peak traffic hours are some of the ideas proposed for raising money to improve infrastructure.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.