A mysterious, dark smoke ring was seen over Kansas on Monday, but scientists say smoke rings like this are usually man-made.

A Kansas man spotted something strange in the sky and shared his bewilderment on Facebook. Frankie Roman Camren posted a video on May 3 of a black smoke ring in the sky. It looked like a giant version ...

Even through a small telescope you can make out that inner ring, which looks like a hazy smoke ring floating in the eyepiece. It looks almost like the solid disk of a planet, which is why these ...