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 hide caption

itoggle caption Courtesy of Gavin Francis

In a blog post, Neal Stephenson says it's time that people develop a new medium, "one in which three-dimensionality is a reality and not just an illusion laboriously cooked up by your brain." Madeleine Ball/NPR hide caption

itoggle caption Madeleine Ball/NPR

Author Norman Bridwell and his wife, Norma, pose for a portrait in 2011. The creator of the Clifford the Big Red Dog stories died Friday at age 86. Charles Sykes/AP hide caption

itoggle caption Charles Sykes/AP