New research has found what could be the first marker for the most common form of dementia

The condition affects more than six million Americans, and that number is expected to balloon in coming years

Polluting microplastics harm ecosystems and the organisms that rely on them

Any physical activity is good for you. But walking is an easy way to help reduce risk

‘Several strong tornadoes are expected, and a long-track high-end tornado will be possible,’ forecasters say