Workers try to remove some of the 11 million gallons of oil spilled by the Exxon Valdez off Alaska in 1989. The ship's third mate may have been up for 18 hours before the accident.
Carolyn Walworth is a junior at Palo Alto High School (the main building of which is shown here in 2012). After four recent suicides in her school district, she wrote an op-ed about the stress faced by students in the area, which is home to some of the nation's most competitive public high schools.
Ho John Lee/Flickr
Engaging, mentally stimulating work is good for the brain, scientists say, whether you get paid to do it or not. Running a household can be as mentally demanding as running a company.