Sometimes it seems that yoga's the vanilla ice cream of the body/mind/spirit crowd—people can't help themselves from sprinkling on their favorite toppings and swirling extras into the basic flavor. How else to perceive AcroYoga, Yogilates, and Cy-Yo, if not as the yogic versions of fudge ripple?

Gravity Probe B, a NASA/Stanford physics experiment, recently finished its year-long mission orbiting the Earth. The final results may take a year to analyze but promise to aid in visualizing the shape of space-time around Earth. If Einstein’s theory of relativity holds true, and this is the big theoretical question that’s being testing, Earth’s spacetime is a vortex: