Archaeologists working in Kenya found the footprints of two distinct human ancestors preserved in the fossilized mud of an ancient lake — walking side by side.
A new CDC report finds that more than 85% of U.S. adults 65 and older are not getting enough exercise. All adults should get moderate aerobic activity and weight or resistance training every week.
Author and TV host Kelly Corrigan has a radical way to support a loved one through a crisis, big or small. Here's her technique to make someone feel like it's safe to open up.
Indigenous advocates called the final agreement in Azerbaijan "drastically insufficient." Now they're focusing on next year's global climate summit in Brazil where Indigenous participation is expected to be historic.
A few years ago, scientists cracked a murder mystery -- they figured out what's been killing Coho salmon in urban streams in the Pacific Northwest. The culprit: particles from tires.