Analysis: The presumptive GOP nominee makes his environmental pitch. It's an advance over President Bush, but that still doesn't make him the green candidate

Record numbers of girls are playing organized sports. But once they quit, staying fit becomes a struggle

As the global population increases, it gets harder to curb greenhouse gas emissions. Simple answer: Control the population

A new analysis suggests that mental illness costs society nearly $200 billion a year in lost earnings -- and that is just the tip of the iceberg

A new study shows that people with lower IQs benefit from complex mental activity during their careers by avoiding brain deterioration

A new study shows that adopted kids are more likely to require mental health help as teens than non-adopted ones

A new study details the daily aches and pains of thousands of Americans. Millions are suffering, and it's costing the country billions

A new study details the daily aches and pains of thousands of Americans. Millions are suffering, and it's costing the country billions.

The Dems may be greener, but the GOP are no slouches. (A Republican created the EPA, after all.) And that's what the Earth needs: good government, not politics

A colossal squid being examined by scientists in New Zealand this week is yielding amazing facts about one of the ocean's shy leviathans

He went a record-breaking 17 minutes without breathing, thanks to intensive training, stamina and some lucky human evolution

Studies show that at least 1 in 5 troops in Iraq and Afghanistan suffer post-traumatic stress or other mental health problems -- but they're too afraid to ask for help

The street magician turned endurance artist talks about his inspirations, his favorite stunts and what it's like to hold your breath for 17 minutes

Dutch researchers are developing a blood test that could predict the onset of menopause and the decline of fertility

Consultations: Dr. De-Kun Li of Kaiser Permanente on what pregnant women should know about caffeine

Dr. De-Kun Li of Kaiser Permanente on what pregnant women should know about caffeine

A decade after Lasik eye surgery hit the market, patients left with fuzzy instead of clear vision are airing their grievances before federal health officials

A new study suggests that legalizing assisted suicide does not make the practice more common in vulnerable groups

PETA is offering $1 million to the first person who can bring in vitro meat to the market. But scientists say, don't hold your breath

Often providing the best care forces doctors to deny patients their liberty

The next generation of new cars and trucks will need to meet a fleet average of 31.6 miles per gallon by 2015, the Bush administration proposed Tuesday

The next generation of new cars and trucks will need to meet a fleet average of 31.6 miles per gallon by 2015, the Bush administration proposed Tuesday

To mark Earth Day, Time.com picks the 15 best environmental sites, covering everything from Hollywood to the Hill

A new study shows that where skin cancer starts on the body plays into how deadly it will be

The world's greatest green champion is no tree-hugger. He's an economist who's made lots of money off the cap and trade of pollutants -- which, incidentally, also cleans the air

Viewpoint: President Bush's new strategy for saving the world from climate change is too little, too late

According to new research, the higher a trader's testosterone level, the more money he'll net before the close of business

A two-year-old company aims to make recycling worth everyone's while: RecycleBank tracks your recycling output and lets you earn points redeemable at stores

A new Yale study suggests Americans may be getting less tolerant of fat people. At least, that's what fat people think

A two-year-old company aims to make recycling worth everyone's while: RecycleBank tracks your recycling output and lets you earn points redeemable at stores

A giant accelerator searches for a tiny and elusive particle that is key to understanding the origins of the universe

A new study shows that gymnastics causes as many injuries as ice hockey or soccer, but improved equipment is helping

A giant accelerator searches for a tiny particle that is key to the universe's origins

New studies suggest that too much coddling of infants can lead to sleep problems -- and health problems -- later on

New surgical techniques promise a day when organs will be removed through the body's natural orifices -- without scars

Author and clinical social worker Michele Weiner Davis says ill-matched libidos are a big cause of marital strife -- and that women are just as sex-starved as men

Climate change means more than warming at the poles. It can intensify disease and famine and endanger human health

Climate change means more than warming at the poles. It can intensify disease, famine, and endanger human health

The effects of climate change extend beyond warming at the poles and threatened species. It can also intensify disease and famine, and endanger the health of the human race.

Why do some smokers get cancer and others don't? Scientists have discovered two genetic variants that may be the reason

A British financial group will pay Guyana's Iwokrama forest reserve for ownership of its "ecosystem services" -- a green commodity the buyers hope to turn into cash

On Saturday, March 29, people all over the world turned off their lights for one hour. Why?

Starting at 8 p.m. in New Zealand on Saturday, people all over the world will turn off the lights for one hour. Why?

A Florida-based company's artificial immune system promises to make testing of new vaccines faster, cheaper and safer

A Florida-based company's artificial immune system promises to make testing of new vaccines faster, cheaper and safer

A large lung cancer trial funded by a cigarette maker raises thorny questions about the integrity of medical research

Everything suffers -- patient care, medicine, even other doctors -- when doctors become company "consultants"

Even as more of them survive their early years, premature babies can have health problems later in life, new research shows

A lead scientist at the Nature Conservancy makes the case that, for lasting success, environmentalists need to protect and foster the diversity in their own ranks

A new Dutch study shows that doctors are increasingly choosing to sedate patients permanently as end-of-life care