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Astronauts spending six months or longer in space should stretch their time between trips to three years, warns new research on the impact of space travel on the brain.

To study this, researchers examined the brain scans of 30 astronauts, looking at scans that depicted their brains both before and after their missions.

The research team included missions that were two weeks long, si...

Consider yourself a lifesaver if you opt for an electric vehicle next time you buy or lease a new car.

Electric cars can save millions of lives and reduce health care costs by improving air quality so people can breathe better and freer, according to a new report by the American Lung Association. Zero-emission electric vehicles don't emit exhaust gas or other pollutants into the atmospher...

Wildfires that have been spreading throughout Canada in recent weeks are now spewing tons of smoke southward into the United States.

The smoke was so thick on Tuesday that New York City's skyline could not be seen clearly and air quality alerts were issued to residents from parts of the N...

Millions of stray cats roam the world over, and surgical sterilization has long been the primary method of population control.

But a small new study shows promising results for a one-and-done contraceptive injection.

Researchers say this first-of-its-kind approach appears safe and effective.

“A non-surgical contraceptive that could result in lifetime sterility following...

Ticks are extremely resilient even when temperatures vary wildly, according to scientists who are working to better understand the spread of Lyme disease.

In their new study, black-legged ticks, notorious for carrying pathogens, were very good at surviving both extreme cold and high heat, the scientists found. This was true both for nymph and adult ticks. Only larval ticks were more affec...

A potentially deadly germ has made its way to the U.S. Gulf Coast, health officials warned this week.

So far, three cases of infection from the bacteria Burkholderia pseudomallei have been reported to the U.S. Centers for Disease Control and Prevention. The bacteria causes melioidosis, which can be fatal if left untreated.

"It is an environmental organism that lives natural...

Large, uncontrolled wildfires in Nova Scotia are creating unhealthy air in the Northeast region of the United States, including parts of Connecticut.

This significant smoke plume is likely to cause elevated levels of fine particulate matter, the American Lung Association warned in its alert. Particulate matter contains microscopic solids or liquid droplets that are so small that they can ...

Microplastic pollution is altering the gut microbiomes of wild seabirds and that could be a warning sign for humans, researchers report.

Scientists from McGill University in Montreal, along with colleagues from around the world, found that tiny bits of plastic present in the gastrointestinal system of seabirds have modified the gut's microbiome. The plastics are also reducing levels of ad...

Be cautious when heading to Florida's beaches this summer, an expert warned, as a 5,000-mile floating mass of sargassum seaweed has begun washing up on the state's shores.

It can be low risk in some instances, but it also has the potential for triggering serious respiratory health issues.

“The sargassum itself is not dangerous. It can have different jellyfish and sea creatures i...

Two western U.S. states issued air quality alerts over the weekend as heavy smoke from fires blazing in Canada drifted south.

Both Colorado and Montana experienced air quality issues because of dozens of Canadian fires. A third state, Utah, noted that it was beginning to see smoke, while Idaho had experienced haze last week, the Associated Press reported.

“People with hea...