President Trump spoke of winning in Afghanistan without defining what victory there would look like. The enemy is a hard-to-define collection of competing extremist groups.
Big food companies like Walmart want farmers to reduce greenhouse emissions from nitrogen fertilizer. But the best-known program to accomplish this may not be having much effect.
By standing strong against the Nazis, America became a beacon of hope to some of the world's greatest scientists — whose positive effects on American science we still feel today, says Adam Frank.
Researchers say hospitals are missing an opportunity to help people with opioid addiction get into treatment by not doing enough when they show up in emergency rooms after an overdose.
A commuter train smashed into an unoccupied train car at the 69th Street Terminal station, 10 miles west of the city. Officials say none of the injuries were life-threatening.