Jay Keasling (left), speaking with Rajit Sapar at the Joint BioEnergy Institute, is pioneering a technique to develop diesel fuel from yeast.
Courtesy of Lawrence Berkeley National Laboratory
Global Thermostat's pilot plant in Menlo Park, Calif., pulls carbon dioxide from the surrounding air. The next challenge is to find uses for the captured gas.
Courtesy of Global Thermostat
Supporters of the NAACP hold signs outside the Supreme Court building on Tuesday. The court ruled that Section 4 of the Voting Rights Act, which aimed at protecting minority voters, is unconstitutional.
Win McNamee/Getty Images
Jim White of Pennsylvania pumps gas at a BP station in Ocala, Fla., in April. The price of gasoline remains stubbornly high, which may put a crimp on summer travel plans.
Doug Engle/Ocala Star-Banner / Landov
Heather Liljengren, a field taxonomist with the New York City Department of Parks and Recreation, examines the seed pods of the Virginia spiderwort at Oakwood Beach, Staten Island. Liljengren collects seeds from across the region for a seed bank of native plants.
A 17-year-old Civil Rights demonstrator is attacked by a police dog in Birmingham, Ala., on May 3, 1963. This image led the front page of the next day's New York Times.
Bill Hudson/ASSOCIATED PRESS