Scientists have found the first eukaryotic organism that functions fine without mitochondria, the "powerhouses" that make energy for the cells of yeast, humans and most other animals.
It's legal to order diagnostic blood tests without consulting a doctor in many states. But critics say healthy patients can go down a rabbit hole of invasive assays and unnecessary treatments.
There are about 1,600 black bears in Great Smoky Mountains National Park and nearly 11 million annual visitors. The park's wildlife biologists have the challenging job of managing the interactions between them.
New Delhi has the most polluted air of any city in the world. NPR explores whether rationing cars in the Indian city could solve the problem.
Dust mites, gall wasps and book lice don't bite, but they might make you wheeze. Scientists found about 100 types of arthropods wiggling or munching skin flakes in typical homes. Take a look.
Novices play better golf when they have expensive brand name equipment, research shows. Brand name products alleviate some performance anxiety but brands have no effect on better players.
Of the more than 1,200 planets in the latest trove turned up by NASA's Kepler space telescope, about half seem to be rocky, like Earth.
In a blow to the coal industry, a new terminal in the Pacific Northwest was denied approval after opposition from environmental groups and a debate between local Native American tribes.
Veteran NPR editor Peggy Girshman, who died in March, wrote her own eulogy, which included personal health advice and tips for better journalism. The eulogy was read at a memorial service Saturday.
Our appetite for the Pacific bluefin — prized for its tender, flavorful flesh — has reduced stocks to just 2.6 percent of original levels. The incentive to save bluefin is ecological — and financial.
Following a string of safety lapses, the National Institutes of Health is making changes at its Clinical Center, the world's largest research hospital.
Positive thinking feels good but it may actually stop you from achieving your goals. This week, we discuss a different approach called WOOP.
How does a country bring its people into the 21st century without pumping huge amounts of carbon into the atmosphere? This challenge is more acute in India than anywhere else. Though India already has the third-largest carbon footprint in the world, around 400 million people still don't have access to reliable electricity.
Women scientists get first-author credit on medical studies much less often than their male coauthors. That has career implications and could even be skewing the study of women's health.
For its latest anti-tobacco campaign, the the Food and Drug Administration wants to harness hip-hop swagger to reach minority teens — who disproportionately suffer the consequences of smoking.
The plunging price of crude oil is good for motorists but bad for those in the industry. And nowhere is that pain more acute than in West Texas, where many are hunkered down with an eye on the future.
Stargazers, ready your (solar-filtered) telescopes: Mercury will pass directly across the sun on Monday for more than seven hours. And you can watch when it does — if you do it just right.
The Ringling Brothers and Barnum and Bailey Circus no longer uses elephants in its shows. The animals are heading for retirement in Florida. But their work isn't done yet.
Fires continue to rage in Alberta, Canada, threatening neighboring provinces. NPR's Melissa Block speaks with CBC reporter Evan Dyer about the continuing crisis.
Time is almost up for consumers to tell the FDA what "natural" food means. It's an ancient philosophical question with no easy answers.