The author, Dr. Gavin Francis, arrived at Halley base on Christmas Eve 2002, at the height of the Antarctic midsummer, when 24-hour sunlight illuminates the vast swathes of empty ice.
Courtesy of Gavin Francis
A woman votes in the first round of the Tunisian presidential election on Nov. 23. The election went smoothly, but no candidate won 50 percent of a vote, forcing a runoff between the top two on Sunday.
Thousands gathered on the National Mall last week to protest the deaths of Eric Garner and Michael Brown. Some law students say their involvement in the protests means their exams should be postponed.
Saul Loeb/AFP/Getty Images
"I didn't want to fire things up," St. Louis County prosecutor Robert McCulloch says of his silence since announcing the grand jury's decision not to indict Ferguson police officer Darren Wilson in the shooting death of Michael Brown.
Lactobacillus acidophilus, which is one variety of the genus Lactobacillus is one of the common active cultures found in yogurt and in the human gut.
Scimat Scimat/Getty Images/Photo Researchers
Smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont., in September. New EPA guidelines treat toxic coal ash from such plants much the same as common household garbage.
Keith Herie is swamped in debt from medical issues he and his wife encountered starting about a decade ago. Heartland hospital is seizing 10 percent of his paycheck and 25 percent of his wife's wages, and has placed a lien on their home.
Steve Hebert for ProPublica
Cubans try to connect to the ETECSA server during a May 9 service outage as they wait with other customers outside the offices of the state telecom monopoly in Havana, Cuba. Cuba's government has blamed technological problems on a U.S. embargo. Critics of the government have said it deliberately strangles the Internet to mute dissent. Changing U.S.-Cuba relations may prove who's right.