There's no shortage of round celestial objects in our universe. Planets, moons and stars all exhibit lovely spherical shapes. But astronomers recently spotted a mysteriously circular orb deep in the ...

Researchers have created a polymer "Chinese lantern" that can snap into more than a dozen curved, three-dimensional shapes by compressing or twisting the original structure. This rapid shape-shifting ...

The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...