Moody's Investor Services says it might downgrade U.S. cities' credit rating if they don't deal with the risks posed by climate change.

Who ruled early farming? Women! Studies of ancient bones show that women's physical labor was crucial to driving the agricultural revolution in Europe.

After years of budget and political pressure, some climate scientists are changing the way they describe their research, and avoiding the term "climate change."

After decades of hope and disappointment, doctors have now been able to treat several different types of genetic conditions by giving each patient a healthy version of their defective gene.

Allegations of sexual harassment often sound like they would make a good lawsuit, but many such cases are quickly dismissed. The law sets a high bar for what constitutes sexual harassment.

Lots of phone and tablet apps promise to improve sleep by filtering out the blue light from device screens. But that won't help if the reason you're not getting enough shuteye is caffeine or stress.

Light therapy can help treat depression that's part of seasonal affective disorder, but it hasn't worked so well for treating bipolar disorder. It may come down to when people are exposed to light.

Many surgeons prescribe strong pain medicine without knowing how much their patients actually need... sometimes leading long-term opioid use.

The marshmallow-chocolate-graham cracker treat was invented a century ago as a coal-miner's snack and is still made by the same Chattanooga bakery.

After Democrats pulled off big election wins in 2017, both parties wonder what that means for the 2018 midterms.