What are sensitivity and specificity, anyway?

The court’s six conservative justices held that the Occupational Safety and Health Administration exceeded its power in issuing the mandate on private companies, which would have covered about 80 million workers.

Health experts say while there are no hard and fast rules, there are best practices for safely getting multiple uses out of N95s or KN95s.

Covid-19 is continuing to spread around the world, with more than 300 million confirmed cases and more than five million deaths reported across almost 200 countries.

Counter to the general assumption that memories simply decay with time, 'forgetting' might not be a bad thing.

Crows have sometimes dropped sticks or leaves or feces onto outdoor diners.

‘History of Mathematics’ explores the origins of arithmetic, algebra, geometry and more.

Is there a difference between the differently colored balls?

Now present-day Iran, Persia can be credited with such inventions as the refrigerator, the battery, and sulfuric acid, all of which were very advanced for the period.

Quantum information breaks the rules of classical information in a way that could allow us to answer questions that a classical computer cannot.

Scientists have studied it many times, and they’ve concluded that the strange, organic-seeming morphologies inside the meteorite were not biological in origin.

So what created them?

Physicists have been busy exploring how our universe might emerge like a hologram out of a two-dimensional sheet. New clues have come from the symmetries found on an infinitely distant “celestial sphere.”

The Dark Energy Spectroscopic Instrument (DESI) has capped off the first seven months of its survey run by smashing through all previous records for three-dimensional galaxy surveys, creating the largest and most detailed map of the universe ever.

The JWST anticipated January 23 arrival at L2 won’t be the final step the telescope must complete before beginning its science mission — months of instrument calibration and testing remain — but it will mark the successful end of a long physical journey that started with a secret trip down the Panama Canal in October.

The system already has over 1,500 satellites in orbit and has received approval to operate 12,000 of them. And that has astronomers worried.

With special treatment, minerals called zeolites — commonly found in cat litter — can efficiently remove the greenhouse gas from the air, researchers report.

The canned food company’s tomato breeding program was responsible for developing several important varieties

5G offers an order of magnitude – 10 times – more bandwidth than its predecessor, 4G. The greater bandwidth is possible because over and above low and medium frequency radio waves, 5G uses additional higher-frequency waves to encode and carry information.

Bioengineers successfully regrew cartilage in a rabbit's knee, a promising hop toward healing joints in humans.

The climate crisis requires ramping up usage of renewable energy sources like solar and wind, but with intermittent availability, scalable energy storage is a challenge.  

Consuming more than 7 grams of olive oil per day is associated with lower risk of cardiovascular disease mortality, cancer mortality, neurodegenerative disease mortality and respiratory disease mortality, according to a study of over 92,000 U.S. adults.

Study calls for cap on production and release as pollution threatens global ecosystems upon which life depends.

The “right” time to shower is an age-old debate. Dermatologists say skin health and hygiene depend much more on how, not when, you’re showering.

Conflicting findings make it challenging to navigate the research investigating the effects of social media on mental health and how best to use social media. With this in mind, Medical News Today sought the input of seven psychology experts.

Cheese is a friend to your oral health for a few reasons, says Dr. Berg. First of all, it's low in carbohydrates—which makes it hard for the oral bacteria biofilm in your mouth to convert carbs to sugar to acid, the latter of which can contribute to tooth decay. And that's not all.

Exercise causes the body to release hundreds of different signals that improve our health in many different ways.

Dogs can figure out some things that even chimps can’t. Our science correspondent puts her puppy retriever to the test

That means the explosive force was more than 500 times as powerful as the nuclear bomb dropped on Hiroshima, Japan, at the end of World War II.

Plus, how they support environmental conservation.

Could our understanding of the deep ocean help unlock the mysteries of outer space? Nasa's space mission is leading us to unexplored depths of our own planet.

Will we get arthritis like our parents used to tell us? 

The glacier is the size of Florida or Britain and currently contributes four percent of annual global sea level rise. If it does collapse, global sea levels would rise by several feet—putting millions of people living in coastal cities in danger zones for extreme flooding.

To thrive, cities must lean into nature. That means having open green spaces and interconnected waterways to prevent floods; green roofs and walls that reduce temperatures and produce food; and forests planted as green belts to oxygenate urban areas and regenerate ecosystems.

Biodiversity loss and the climate crisis could interact to drive plant species to extinction.

Corals in the Gulf of Aqaba have a unique evolutionary history that could help them survive the climate crisis. Scientists even hope to breed their resilience into other reefs.

In northern Norway, trees are rapidly taking over the tundra and threatening an ancient way of life that depends on snow and ice.

The Environmental Investigation Agency (EIA) says there's a cascade of evidence of harm from plastics. It argues that the plastic pollution threat is almost equivalent to climate change.

"To put it simply, advertising and public relations campaigns for fossil fuels must stop," states an open letter to ad agencies and major firms.

As the United States and other countries work toward net-zero emissions by 2050, the lack of clear data from the U.S. Defense Department—the world’s largest employer—and other militaries is a major stumbling block.

France asked 150 ordinary people to make climate policy. They ended up clashing with President Macron.

The anticipated increase in emissions shows the United States is far off track to reach net zero by 2050.

While the temperature at Earth’s surface is what people experience day to day, the temperature in the upper part of the ocean is a better indicator of how excess heat is accumulating on the planet.