To keep a Hula-Hoop aloft, it helps to be in shape — literally. Experiments with gyrating, hoop-slinging robots have revealed how these spinning rings stay up despite the pull of gravity.

Modern Hula-Hoops are plastic rings you twirl around your body by moving your hips. This swiveling motion is similar to that ...

For example, a 24” hula hoop with 13 plants means 13 x 13,872 and an average population of 180,336. Some field guides will also provide tables with the math already completed for these and ...

Or sign-in if you have an account. It turns out that hula hooping comes naturally to certain people and no matter how hard others may try, they still won’t be able to keep the hoop elevated for ...