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.

Big rigs get mpg boost, electric car goes solar, supermice rise in Europe, and more.

'Huge' step in cancer fight, Mars rover sends new pics, actress boosts alien hunt, and more.

Bad outlook for U.S. drought, dino gave live birth, meteor shower tonight, and more.

Schools save energy, E. coli spurs beef recall, Europe vs. Asia on rhinos, and more.

Cities adapt to climate shifts, oil fouls North Sea, walking lengthens lives, and more.

Arctic oil worries natives, school lunches get real, sleeping bears still trouble, and more.

The Hudson's Bay Company is established, and Centralia residents fight eviction.

Find out where to fill up with biodiesel on a road trip.

MNN reports from an unconventional convention.

Sneak preview of National Geographic's investigation on climate change, agribusiness and the global food crisis.

Sneak preview of National Geographic's investigation on climate change, agribusiness and the global food crisis.