A new study found an association between sperm quality and life expectancy: Men with fast, strong sperm had increased ...

THR-beta agonists are the only medication approved to treat metabolic dysfunction–associated steatohepatitis (MASH), a severe form of liver disease. Learn more.

Children under 5 are at the highest risk of serious measles complications, but the recent death involved an unvaccinated adult. This story was originally published on February 19, 2025. It has ...