There's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is composed of several layers held together by intense forces of gravity.

Potential patches of Earth's ancient crust, sometimes called "sunken worlds," may have just been discovered deep within the mantle, thanks to a new way of mapping the inside of our planet.

And now, there's another one of those making the rounds on TikTok—chin straps. To find out, I picked up the Juskaa V-Line Lift Mask chin strap and asked the experts for their thoughts.

You can and should strap up to focus on your larger goal of building muscle, not moving weight or building overall strength. We earn a commission for products purchased through some links in this ...