The ruling says that the plan does not ensure protections for threatened and endangered species of fish and other animals when fighting wildfires.

A gap in the fossil record preceding the Cambrian has ignited intense interest among geologists.

The oil is clearing much faster than expected, but concern remains over the unseen effects.

The discovery that Titan’s lakes are evaporating, at least in the Southern Hemisphere, suggests that there are active weather and geological cycles analogous to those on Earth.

The data from two separate experiments at Fermilab narrow the range in which the Higgs boson, if it exists, must be hiding.

Jane Brox’s narrative is in many ways a social history, told through man’s relationship to light.

At an estimated 13 pounds, a giant rat that may have lived as recently as 1,000 years ago was bigger than any previously known.

A wellhead spewing oil up to 100 feet into the air was at least the third unrelated oil leak in the Louisiana area since the Deepwater Horizon spill began.

Utilities are developing storage batteries to smooth the flow of intermittent sources of power, like wind farms.

Thousands of caves and abandoned mines on federal land in five states will be off limits to explorers for the next year to prevent humans from spreading a disease that kills bats.

Crews were working to contain and clean up more than 800,000 gallons of oil that poured into a creek and flowed into the Kalamazoo River in southern Michigan.

The Environmental Protection Agency ruled last month that the state’s flexible air permit program violated the Clean Air Act.

A three-judge panel reversed a ruling requiring the Tennessee Valley Authority to upgrade emission controls at three coal-fired power plants.

Plastiki, a sailboat made of recycled material intended to raise awareness of the perils of waste, completed its difficult 8,000-mile Pacific crossing, arriving at Sydney.

Experts are pondering issues raised after a trial found that a vaginal gel could help women avoid infection.

A patient illicitly selling part of his medication helps fight AIDS in his own strange way.

Mounting evidence suggests that therapy can help reduce the frequency and intensity of nightmares.

Sudep, for sudden unexplained death in epilepsy, accounts for up to 18 percent of all epilepsy deaths , yet many patients and their families never hear about it until someone dies.

In her new book, Sonia Shah has spun a disease yarn that’s not a yawn.

The Food and Agriculture Organization effort encourages nations around the world to bring the disease under control.

Only one-third of those without health insurance are routinely screened for colorectal cancer, according to a new report.

Transfusing patients with their own blood can halve the number of blood products used in hospitals and reduce costs, a study reports.

Zinc nasal gel products can cause some patients to lose their sense of smell, a new analysis finds.

Eleanor Sterling is at the Palmyra Atoll National Wildlife Refuge in the Central Pacific studying the ecology and behavior of the two species of sea turtles.

Taking an aging vehicle across the Chalbi Desert in Kenya is risky even in the best weather.

Each decade since the 1980's has been progressively warmer than the last, with an average warming of about one-fifth of a degree Fahrenheit per decade.

Years of work remain to assess the harm caused by BP's oil spill.

Some foes of cap and trade are far less averse to a clean energy mandate.

An Apollo science project to balance human actions and the planet's limits

If the tobacco hornworm looks odd from the outside as it crawls, check out the inside.

To spread its spores, Sphagnum moss shoots them upward in a mushroom cloud shape.

Rising temperatures have helped the marmot population, at least for now.

I want very much to have a big dog but am told the apartment is not large enough. What can I do?

Puzzles that explore the causes of "telepathy."

Patients have the right to review their medical records, but few have laid eyes on them. Many doctors worry the documents will be misread.

If recent findings hold up in future research, the consequences of vitamin D deficiency are likely to go far beyond excessive bone loss.

Can too much running induce acid reflux?

Letters to the editor.

A letter to the editor.

Letters to the editor.