Stefano Amabili walks under the sun in Miami Beach, Florida, in May. The Center for Disease Control and Prevention has found that more people are using sunscreen and protecting themselves from the sun's rays.
Joe Raedle/Getty Images
From left: Frank Wild, Ernest Shackleton, Dr. Eric Marshall and Jameson Adams head back to base camp after getting within 97 miles of the South Pole — closer than anyone had gotten before them — in January 1909.
A man stands in a fountain in Washington Square Park on July 18, in New York City. Temperatures were expected in the upper 90's during another heat wave in the city.
Mario Tama/Getty Images