Environment

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In this July 3, 2015, file photo, ground crew push the Solar Impulse 2, a solar-powered airplane, toward the hangar after landing at the Kalaeloa Airport in Kapolei, Hawaii. The Solar Impulse team said in a news release early Wednesday, July 15, 2015, that they are suspending the around-the-world journey in Hawaii, after the plane suffered battery damage during its flight to the islands. (AP Photo/Marco Garcia, File)

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WHICH OF THE FOLLOWING IS THE SCIENTIFIC TERM FOR AN ORGANISM THAT MAKES ITS FOOD FROM INORGANIC MATERIALS?

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IF YOU TAKE THE SQUARE ROOT OF 16 AND ADD IT TO THE SQUARE ROOT OF 9, THE ANSWER YOU GET IS THE SQUARE ROOT OF WHAT OTHER NUMBER?

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IN 1821, MOSES AND STEPHEN AUSTIN RECEIVED 18,000 ACRES OF LAND IN WHAT WOULD BECOME WHAT U.S. STATE?

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This July 13, 2015, image provided by NASA shows Pluto, seen from the New Horizons spacecraft. The United States is now the only nation to visit every single planet in the solar system. Pluto was No. 9 in the lineup when New Horizons departed Cape Canaveral, Fla, on Jan. 19, 2006 (NASA via AP)

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This July 13, 2015 image provided by NASA shows Pluto from the New Horizons spacecraft. The United States is now the only nation to visit every single planet in the solar system. Pluto was No. 9 in the lineup when New Horizons departed Cape Canaveral, Fla, on Jan. 19, 2006 (NASA via AP)

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Upon announcing his presidential campaign, Wisconsin Gov. Scott Walker said he would work with Congress to repeal Obamacare if elected in 2016. (Associated Press)

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Louisiana Gov. Bobby Jindal gave Sen. Bernard Sanders backhanded praise over Mrs. Clinton, saying the Vermonter "is willing to call himself a socialist."

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Despite President Obama's hailing clean energy as the next great thing for America, watchdog groups say that government subsidies for solar power have led to artificial demand. (Associated Press)

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Condoms with messages about preventing human births to save animal species will be passed out July 11, 2015 for World Population Day, said the Center for Biological Diversity. (Image courtesy of the Center for Biological Diversity)

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National Edition News cover for July 10, 2015 - Support for lifting U.S. ban on oil exports growing: Studies from Harvard and the GAO show that lifting a ban on exporting oil from the U.S. would lower domestic gasoline prices. Democrats have joined Republicans to push for overturning the export ban. (Associated Press)

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Potential GOP presidential candidate Wisconsin Gov. Scott Walker drew praise from social conservatives for his plan to sign a 20-week abortion ban. (Associated Press)

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The Congressional Progressive Caucus is scheduled to host a forum Wednesday drawing parallels between the tobacco and fossil fuel industries in support of a coordinated effort to use the legal system to pursue climate change dissenters. (Associated Press/File)

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In this Oct. 17, 2007, file photo, Kiger Mustangs from the Kiger Management Area near Diamond in southeast Oregon are shown. Wild horse advocates are challenging U.S. Bureau of Land Management plans to round up the famous Kiger and Riddle Mountain mustang herds in eastern Oregon, arguing that the roundup is designed to breed a master race of wild horses exhibiting old Spanish bloodlines, violating the intent of the law protecting wild horses. (Jamie Francis/The Oregonian via AP, file) MANDATORY CREDIT

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Buck/Hood Hoodlum Knife - This is the ultimate survival knife. It can help you survive in extreme outdoor conditions. Its handle is built with a Shock Mitigation System (SMS), which alleviates shock and wasted energy. It also has a groove cut into the blade spine, which can be used to score bone, bend wire, or remove pots from a campfire. This knife will serve all of your survival needs!

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Sales of 3-D printers are expected to double to 217,000 this year. The Defense Department is testing how they can help soldiers in the field by "printing" food, medicine and weapons, and is even exploring the ideas of printing antennas and warheads. (Associated Press)