A neutrino detector like this one, seen at Los Alamos National Laboratory in 1995, was used to collect data claiming that neutrinos can travel faster than the speed of light. Fred Rick/Time & Life Pictures/Getty Image hide caption

itoggle caption Fred Rick/Time & Life Pictures/Getty Image

Ice on the Arctic Ocean has melted to its second-lowest level on record. Above, ice in a fjord in Greenland. Slim Allagui/AFP/Getty Images hide caption

itoggle caption Slim Allagui/AFP/Getty Images

Carbon Engineering's machine, currently under construction, will draw carbon dioxide out of the air and turn it into a usable product. Carbon Engineering hide caption

itoggle caption Carbon Engineering

NASA's Kepler mission has discovered a planet that circles two stars instead of one. The planet, shown as the black dot in this artist's illustration, is similar to Saturn, though it is more dense and travels in a 229-day circular orbit around its two stars. R. Hurt/NASA/JPL-Caltech hide caption

itoggle caption R. Hurt/NASA/JPL-Caltech

U.S. Park Police officers arrest demonstrators in front of the While House on Thursday. They were protesting against a proposed 1,700-mile-long pipeline that would carry oil from the tar sands in Alberta, Canada, to the U.S. Gulf Coast. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

A polar bear makes its way across the ice in Canada's Northwest Passage. Melting ice in the Arctic will make survival increasingly difficult for wildlife in the region. Jackie Northam/NPR hide caption

itoggle caption Jackie Northam/NPR

A new study finds that when applying for scientific research grants from the National Institutes of Health, white researchers succeeded 25 percent of the time, while blacks about 15 percent of the time. Above, the Mark O. Hatfield Clinical Research Center at the NIH Campus in Bethesda, Md. NIH hide caption

itoggle caption NIH

White pox disease on a frond of the endangered elkhorn coral on Carysfort Reef in the Florida Keys. The bacteria are overlying the coral tissue, exposing the coral's white limestone skeleton underneath. James W. Porter/University of Georgia hide caption

itoggle caption James W. Porter/University of Georgia

The move by Micronesian islands to create a shark sanctuary two-thirds the size of the U.S. is the latest in a series of shark preservation areas aimed at reviving declining populations. Above, a group of hammerhead sharks swim in the Pacific Ocean off the coast of Malpelo in this undated photo. Yves Lefebre/AP hide caption

itoggle caption Yves Lefebre/AP
NASA/JPL/University of Arizona

Engineers at the Grand Gulf Nuclear Generating Station in Mississippi practice disaster and emergency situations in a mock-up control room. Every nuclear plant in the U.S. has control room simulators that are nearly exact replicas of the real facilities. Richard Harris/NPR hide caption

itoggle caption Richard Harris/NPR

Workers at the Fukushima Dai-ichi nuclear power plant spray a substance to help reduce dust on April 1. Experts say it's likely that workers at the plant could have reduced the severity of the accident if they had made different decisions during the crisis. TEPCO hide caption

itoggle caption TEPCO