You hang this way for a few minutes. Inversion therapy is also called spinal traction. The theory is that being upside down eases the pressure of gravity on your nerves and the disks in your spine.

The best inversion tables operate by allowing users to adjust the angle of inversion, letting gravity assist in stretching and decompressing the spine, says Brian Wallace, DC, a chiropractor at Pi ...

So, where does the arrow of time come from? A growing group of physicists believe that it originates in the force of gravity itself. But to get there requires a radical reshaping of Einstein’s ...