Ancient DNA from the Medici brothers' remains revealed a novel malaria strain, offering scientific proof against longstanding poisoning rumors, researchers say.

Researchers have found that being multilingual may delay dementia diagnoses and that the brains of people who spoke two or three languages looked six years younger.

With human bodies being bags of mostly salty water and countless messy biochemical processes, it’s little wonder that over time some residues tend to collect in these systems. Although evolut…

California is among a number of states seeing more COVID cases this summer. Is there a cause for alarm?

Cannabis is widely considered to be a stress reliever – at least for some – but there's new evidence that it might actually have the opposite effect when used regularly.

A single 30-minute sauna session may briefly put the immune system on higher alert. Finnish researchers found that sauna heat, paired with a short cold shower, increased every type of white blood cell circulating in the bloodstream, including key infection fi…

A teenager who was swimming in a Maryland lake was bitten by a beaver that tested positive for the rabies virus.

Health officials in Florida confirmed the state's first death from the flesh-eating bacteria known as Vibrio vulnificus. Vibrio infections have also been reported in Alabama and Connecticut this year.

The blood-brain barrier surrounds the blood vessels that run through the brain, letting in oxygen and nutrients while keeping out toxins and pathogens.