An incredibly bright flash that appeared in the night sky in February was the result of a star straying too close to a supermassive black hole, meeting its untimely end there as it was ripped to shreds.
December 1 is World AIDS Day, an annual event dedicated to raising awareness and money to fight AIDS around the world. Here are five ways you can help make a difference.
The US Food and Drug Administration is considering shifting its blood donation policy away from blanket assessments toward questionnaires that focus more on individual risk, it said Wednesday.
Wolves are pack animals, living in family groups led by a matriarch and her mate. Some wolves stay with their pack their whole lives, helping hunt and raise pups like aunts and uncles as they mature, but others split off to find a mate of their own and start their own packs.
Rents soared during the pandemic, exacerbating a shortage of available housing in most U.S. cities. The result will be growing numbers of people stuck in substandard housing, often with environmental hazards that put them at higher risk for asthma, lead poisoning and other medical conditions.
Deaths related to drug misuse and alcohol abuse appear to be on the rise among older adults in the United States, similar to the recent increases seen among younger adults, according to two new reports from the US Centers for Disease Control and Prevention.
Early research suggests a promising use of artificial intelligence to predict the 10-year risk of death from a heart attack or stroke from a single chest X-ray.
The experimental drug lecanemab shows "potential" as an Alzheimer's disease treatment, according to new Phase 3 trial results, but the findings raise some safety concerns because of its association with certain serious adverse events.
Corticosteroids are commonly used to treat the pain of osteoarthritis, but two new studies have suggested they may be quickening the progression. Experts point to other methods of treatment that may be better in the long term.
Firearm deaths surged in the US during the Covid-19 pandemic, killing a record number of people in 2021. But as America's gun epidemic gets worse, its burden is not equal.
Long ago, gigantic marine turtles swam the Earth's seas. Until recently, these prehistoric giants, reaching lengths of over 3 meters (10 feet) from head to tail, had been thought to be found only in waters surrounding North America.
Adult friends are hard for everyone — especially for men told that opening up to someone else is only for women. But experts say that the social, emotional, mental and health benefits should make friendships a priority for everyone.
A woman lost part of her vision and inadvertently put her family at risk of mercury poisoning, most likely from using skin whitening products containing high levels of mercury, a case report shared exclusively with CNN shows.
The Orion spacecraft, which is at the core of NASA's historic Artemis I mission, reached its farthest distance from Earth Monday afternoon, shattering the record for the maximum distance a spacecraft designed to carry humans has ever traveled.
Americans gathered for Thanksgiving last week amid a flu season that's worse than any has been in more than a decade, and experts continue to urge caution as multiple respiratory viruses circulate at high levels nationwide.
The Covid-19 pandemic has carried a key lesson for public health officials, Dr. Anthony Fauci said Monday: When talking to Americans, be clear that science is often a moving target.
