Scientists have spotted a new kind of signal in space- four strange, circular objects. Three are particularly bright around their edges, like rings, or bubbles. And they have no idea what they are.

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A paper on the objects titled "MeerKAT uncovers the physics of an Odd Radio Circle" has been accepted for publication into the Monthly Notices of the Royal Astronomical Society. The mysterious glowing ...

Radio astronomers see what the naked eye can’t. As we study the sky with telescopes that record radio signals rather than light, we end up seeing a lot of circles. The newest generation of radio ...

E.T. phone the former royals. A flying saucer was allegedly spotted hovering near Harry and Meghan’s $14 million mansion outside Los Angeles. A mysterious circular object was seen in the mountains ...

This circular dividing engine fits on a table. It has an iron, T-shaped base with three holes for attaching the engine to a base. A mechanism with lever handle and tracer arm, a microscope on a ...