[scouse]

NOBODY has ever seen a black hole. Yet, despite this lack of direct evidence, most scientists believe that a massive star at the end of its life can implode to form an object so dense that nothing-not even light-can escape.

They may be about to change their minds, however. Two researchers in the US are pointing out that physicists have swept some "humiliating" problems with black holes under the carpet. By confronting these problems, they say, they have found an alternative fate for a collapsing star.

Emil Mottola of theLos Alamos National Laboratory in New Mexico and Pawel Mazur of the University of South Carolina in Columbia think it mightturn into an exotic bubble of superdense matter, an object they call a gravastar.

I read this somewheere

[Physicist]

I read this somewheere

Try here. You might also find out why we think there are black holes, even though we've never seen them.