NASA's RoboSimian is among the robots taking part in the Defense Department competition. The Space Agency may one day use it to explore caves on other planets.
Dan Goods/JPL
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The headquarters of the South American Football Confederation, or CONMEBOL, in Luque, Paraguay. The confederation has the status of an embassy, which includes legal immunity in Paraguay. Two former heads of CONMEBOL have been indicted in the FIFA scandal, accused of taking bribes and money laundering.
Norberto Duarte/AFP/Getty Images
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A blood test developed by Harvard researchers checks for evidence of past infection with more than a thousand strains of virus, from about 200 virus families. The swine flu virus shown here, A/CA/4/09, rarely infects humans.
C. S. Goldsmith/CDC
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Workers use perforating tools to create fractures in rock. An EPA study finds that "fracking" to reach and extract deep pockets of hydrocarbons has not caused widespread drinking water pollution.
Brennan Linsley/AP
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South Korean school students put on face masks during a special class on the MERS virus at an elementary school in Seoul.
Jung Yeon-je/AFP/Getty Images
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American Pharoah and trainer Bob Baffert at Belmont Park in Elmont, N.Y. American Pharoah will try to become horse racing's first Triple Crown winner since 1978.
Seth Wenig/AP
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NASA's RoboSimian is among the robots taking part in the Defense Department competition. The Space Agency may one day use it to explore caves on other planets.
Dan Goods/JPL
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