Teens who lose teeth to decay and injury nearly twice as likely to be bullied, study reveals

Animals teach children empathy, tolerance, patience and the ability to love something other than themselves. Bernard Williams, the English philosopher, once said, "no symphony orchestra ever played music like a 2-year-old girl laughing with a puppy," and being a mother, I wholeheartedly agree.

For years now, research studies across the world looking at happiness across our lifetimes have found a U-shape: happiness falls from a high point in youth, and then rises again after middle age. This has been mirrored in studies on unhappiness, which show a peak in middle age and a decline thereafter.

The American Cancer Society (ACS) has released Prostate Cancer Statistics, 2025, a report on current prostate cancer occurrence and outcomes in the United States. According to the study, prostate cancer incidence rates have reversed from a decline of 6.4% per year during 2007 through 2014 to an increase of 3.0% annually during 2014 through 2021, with the steepest increase (4.6–4.8% per year) for advanced-stage diagnoses.

Clinicians typically classify meningiomas—the most common type of brain tumor—into three grades, ranging from slow-growing to aggressive.

Knee crepitus, the sound of cracking or grinding in the knee joint, is very common across all age groups.

Autism is often thought of as a childhood condition, but this is far from true. Autism is a lifelong condition—and most autistic people are adults. Yet less than 1% of autism research has focused on older autistic people.

If you're feeling sore from a run or gym session, you might wonder whether it's better to push through or give your body a rest.

Cancer kills 1 in 5 people globally. Yet, except for a one-off increase in 2021, the flow of money for cancer research has trended downward every year since 2016.

Most people recognize Alzheimer's from its devastating symptoms such as memory loss, while new drugs target pathological aspects of disease manifestations, such as plaques of amyloid proteins. Now a sweeping new study in the journal Cell by MIT researchers shows the importance of understanding the disease as a battle over how well brain cells control the expression of their genes.

A new study from the University of Sydney has revealed how type 2 diabetes directly alters the heart's structure and energy systems, offering vital insights into why people with diabetes are at greater risk of heart failure.

Dementia researchers have called for updates to the diagnostic criteria for one of the most common younger-onset forms of the disease, behavioral variant frontotemporal dementia (bvFTD), a condition similar to the one actor Bruce Willis has been diagnosed with.

After coronary artery bypass grafting (CABG), evolocumab did not reduce saphenous vein graft disease rates at two years compared with placebo, according to late-breaking research presented in a Hot Line session presented Sept. 1 at ESC Congress 2025. The study was concurrently published in The Lancet.

Despite swimming in different worlds, fish and humans are biologically much closer than one might think. Capitalizing on this kinship, researchers have now used zebrafish embryos to come up with a promising new therapy for kaposiform lymphangiomatosis (KLA)—a rare, life-threatening genetic disorder of the lymphatic system.

It's one of the most insidious diseases you've never heard of, but Chagas is in California and 29 other states across the U.S.

Stricken with cancer in infancy, Jessica Lopez endured tumor-fighting treatments that saved her young life but also left her with lasting heart damage.

Exercise decreases the risk of developing cancer. Studies have shown there is a 30–35% reduction in the risk of breast cancer among the most physically active women compared with those who are least active. Exercise also plays a protective role in many other cancers, including lung, endometrial, colon, kidney, bladder and esophageal.

Decision-making, the process through which humans choose between different available options, has been the topic of countless neuroscience, psychology and behavioral science studies. This process does not only include the moment in which a person comes to a decision, but also the evaluation of different options and, at times, changing one's mind.

More than one in every 100 deaths globally is due to suicide, the World Health Organization said Tuesday, calling for urgent action to stem a mounting mental health crisis among young people especially.