Circles are beautiful. Their combination of symmetry and round edges recalls the shape of the Earth, the sun, the solar system, and even the cycle of life itself. No wonder they've appealed to artists ...

Just over a year ago, back when Twitter’s fate was still in the balance, the company came out with its Circle feature. This feature lets users share tweets only with a designated group of followers.

Circles are beautiful. Their combination of symmetry and round edges recalls the shape of the Earth, the sun, the solar system, and even the cycle of life itself. No wonder they've appealed to artists ...