Scientists say they’ve confirmed Earth’s inner core has been slowing down. Here’s what it could mean — and why the topic has been the subject of fierce debate.

In TODAY.com's Expert Tip of the Day, a trainer reveals how she can always tell when a client is neglecting their deep core and her top exercises to try.

Sometimes a "-core" can be hyper-specific, relating to a particular celebrity versus a more general vibe. A "Harry Styles-core" aesthetic might include cherries, pearls and Pleasing merchandise.

This is why incorporating core exercises into your workout routine is so important. What many people don't realize is that our core is more than just the abdominals. You may be surprised to learn ...

Earth's inner core is a roughly moon-size chunk of solid iron and nickel that lies more than 3,000 miles (4,800 kilometers) below our feet. It is surrounded by the outer core — a superhot layer ...

For those who are physically active, core stability also helps prevent injuries due to overuse of muscles. A strong core can make movements smoother and more effective, thereby reducing the ...