Have we come close to getting the answer on alien existence? Four mysterious, deep circular objects, which were never seen before, have been observed in deep space by massive radio telescopes. The ...

There's something unusual lurking out in the depths of space: Astronomers have discovered four faint objects that at radio wavelengths are highly circular and brighter along their edges. And they're ...

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.