Atomic Scientists Announce Possible Change To Doomsday Clock

WASHINGTON, DC - JANUARY 22: Scientists from the group Bulletin of the Atomic Scientists speak during a press conference after updating the ÒDoomsday ClockÓ January 22, 2015 in Washington, DC. The group moved the clock, considered a metaphor for the dangers facing the world, from 5 minutes to midnight to three minutes to midnight due in large part to growing concern over global climate change. From left to right are Kennette Benedict, executive director of BAS; Sharon Squassoni, director of the Proliferation Prevention Program at the Center for Strategic and International Studies, Sivan Kartha , senior scientist at the Stockholm Environment Institute; and Richard Somerville, research professor at Scripps Institution of Oceanography. (Photo by Win McNamee/Getty Images)