Scientists hope to use a fungus to keep malaria-carrying mosquitoes like the Anopheles gambiae species from growing resistant to insecticides. Courtesy of James Gathany/CDC hide caption

toggle caption Courtesy of James Gathany/CDC

Robert O'Rourke was diagnosed with idiopathic pulmonary fibrosis in late 2006. The lung disease causes scarring in the lungs, which makes breathing difficult. Courtesy of Robert O'Rourke hide caption

toggle caption Courtesy of Robert O'Rourke

An American black bear from the Kenai Peninsula in Alaska. A new study found that a bear's metabolism in hibernation drops by nearly 75 percent while its body temperature falls just slightly. Oivind Toien/Institute of Arctic Biology, University of Alaska, Fairbanks hide caption

toggle caption Oivind Toien/Institute of Arctic Biology, University of Alaska, Fairbanks

Hazardous materials experts enter the Hart Building of the U.S. Senate on Nov. 7, 2001, in Washington. The building was closed after an anthrax-laced letter was found in then-Sen. Tom Daschle's office. Stephen Jaffe/AFP/Getty Images hide caption

toggle caption Stephen Jaffe/AFP/Getty Images

Fleas push off the ground from the ends of their legs, not from the part of the leg that resembles a knee. Gregory Sutton hide caption

toggle caption Gregory Sutton

Researchers have sequenced the genome of the common water flea, Daphnia, shown in this false-color micrograph. About 35 percent of the genes are brand new to science. Jan Michels/Christian-Albrechts-Universitat zu Kiel hide caption

toggle caption Jan Michels/Christian-Albrechts-Universitat zu Kiel

With just 600 residents and no cities, Sark, located about 80 miles off the coast of England in the English Channel, is the first dark-sky island. Phllip Capper/Flickr hide caption

toggle caption Phllip Capper/Flickr

The space shuttle Challenger explodes shortly after lifting off from the Kennedy Space Center in Cape Canaveral, Fla., on Jan. 28, 1986. Bruce Weaver/AP hide caption

toggle caption Bruce Weaver/AP

To eat, chitons use their teeth, which look like black bulbs with bluish highlights, to grind up rock. Lyle Gordon/Northwestern University hide caption

toggle caption Lyle Gordon/Northwestern University

The planet Kepler-10b, seen in this artist's drawing, is about 1.4 times the size of Earth and is the smallest planet ever discovered outside of our solar system. NASA hide caption

toggle caption NASA

A human baby typically weighs about 6 percent of what its mother weighs. This baby, seen on a beach in Costa Rica, crawls next to an olive ridley sea turtle. Yuri Cortez/AFP/Getty Images hide caption

toggle caption Yuri Cortez/AFP/Getty Images

The Nintendo 3DS offers 3-D imagery without 3-D glasses. But scientists warn that if young children use the device in 3-D mode, it could be harmful to their vision. Shuji Kajiyama/AP hide caption

toggle caption Shuji Kajiyama/AP

NPR thanks our sponsors

Become an NPR sponsor