Space shuttle heads home, U.S. floods spread, CO2 emissions rise, and the amount of groundwater humans use is adjusting the earth's wobble.

WHO: phones may cause cancer, space shuttle lands, hurricane season begins, and more.

New E. coli sweeps Europe, tornadoes hit Mass., sharks like AC/DC, and more.

New superbug found, nukes cause 'boy booms,' jet streams may power world, and more.

New suspect in E. coli outbreak, wind power killing eagles, volcano erupts in Chile, and more.

Fires scorch Arizona, floods boost wildlife, speed limits may save whales, and more.

Heat wave hits U.S., floods strike China, pavement worsens pollution, and wildfire continue to rage across Arizona.

Arizona fire grows, Romney goes rogue, Facebook vs. landfills, and the war against invasive species in the U.S. heats up.

Can Germany nix nukes? Did meteors spark life? Is squid the new panda? Will wildfires in Arizona cease?

New 'Dirty Dozen' released, autism linked to toxins, jellyfish worsen warming, and the world should brace itself for the weird weather to continue.

GOP candidate targets EPA, fires doom fireworks, Scotts embraces pot, and the Missouri River breaks through two levees.

New rules for sunscreen, U.S. nuke chief under fire, sun may take siesta, and more.

Mob cleans tsunami debris, NASA finds millions of black holes, 'SpongeBob fungus' discovered, and more.

Congress tackles ethanol and 'frankenfish,' warmth killing flowers and bees, and Arabian oryx seems to be making a come back from extinction.

Water wars grip Texas, armadillos advance, snow boosts killer fungi, and more.

Summer starts today, seas in dire straits, U.S. nuke leaks revealed, and more.

Human gene has 'sixth sense,' mining linked to birth defects, 'Cars 2' vs. Big Oil, and more.

Floods may hit Calif. next, study ranks fattening foods, alien ocean found, and more.

Oil release draws fire, record floods hit North Dakota, platypus in peril, and more.

Experts warn of gas bubble, floods threaten nuke plant, lost penguin in rehab, and more.

BPA emasculates mice, floods and fires near nukes, home wind power grows, and more.

Nuclear smoke at Los Alamos, space junk threatens astronauts, and more.

California puts cap-and-trade on hold, scientists discover brightest object ever found, and more.

New York may lift fracking moratorium, fires may forever change Southwest ecosystem, and more.

Yellowstone oil spill festers, autism linked to RXs, shuttle crew arrives for last launch, and more.

EPA readies new air rules, dust storm hits Phoenix, giant wombat found, and more.

Oil spill raises pipeline doubts, Atlantis crew teases surprise, grizzly kills hiker, and more.

Space shuttle Atlantis lifts off, EPA issues new air rules, polar bears are Irish, and more.

Space junk haunts shuttle, heat wave hits U.S., critics boo 'Zookeeper,' and more.

Drought grips U.S., GOP wages battle of the bulb, fish uses tools, and more.

New space race starts, GOP loses bulb battle, dirty socks fight malaria, and more.

CO2 capture on hold, lost 'rainbow toad' found, rare cats endure war, and more.

Study reveals humans' top eco-flaw, whaling summit ends in walkout, why beta males are happier, and more.

U.S. bakes in heat wave, beef scare sweeps Japan, BP spills oil in Alaska, and more.

Last shuttle heads home, pine trees in peril, EPA sued over L.A. smog, and more.

NASA eyes asteroid, U.S. science smarts criticized, ethanol tied to price spikes, and more.

Space shuttle era ends, heat wave bakes U.S., Kenya burns ivory, and more.

U.S. heat wave peaks, crooks steal crops, Iran aims for space, and more.

Record 'dead zones' plague U.S., new heat wave likely, toxic thaw in Arctic, and more.

Fires to reshape Yellowstone, GOP pushes pipeline, hints of 'God particle' seen, and more.

U.S. eco-activist sentenced, cougar walks 1,500 miles, EPA delays ozone rule, and more.

The mob vs. wildlife, GOP vs. EPA, tequila vs. corn ethanol, and more.

Humanity to hit 7 billion in 2011, U.S. unveils new mpg rules, Shark Week begins, and more.

Key fish in crisis, rhino wars escalate, rescued penguin to be released, and more.

U.S. suffers record heat, lethal radiation in Japan, 'unicorn' plant at risk, and more.

Amazon damage rises, heat wave roasts U.S., new proof of 'multiverse,' and more.

U.S. wolves in crosshairs, Earth's moon may be 2 in 1, cyclone hits Haiti, and more.

Photos suggest water on Mars, Shell to drill in Arctic, storm outlook worsens, and more.

Economic rut spurs ecological rush, EPA vs. 'glymes,' icebergs vs. drought, and more.

EPA may delay ozone rule (again), Japan hid radiation info, DNA traced to meteorites, and more.