As the article says, it is not a black hole from which light cannot escape, but one from which sound waves (which move considerably slower) cannot escape. So there is no need for panic

@cooloo

Wrong.

Harmless black holes

Physicists have repeatedly said that fears about these artificial black holes are "groundless."

For instance, microscopic black holes would probably lose more mass than they absorb and so would evaporate immediately.

Say a black hole was created and that black hole was stable. "Then their interactions would be very weak. They would pass harmlessly into space. They would vanish," Gordon said, referring to stable black holes with no electrical charge.
http://www.livescience.com/technolog...ack-holes.html

-Incorrect. A true black hole can be metaphorized, relatively, with a rapid stream of water, such as a rip tide. That riptide isnt sucking everything down the waterfall like crazy, whatever happens to fall into the water goes down, with the water. You can stand on the side of that river, just dont get too close; youll fall in, and you aint comin back. (Unless Hawking is correct ;))


-Plausible. That isnt 'the' requirement. You just need a ridiculous amount of matter, compacted to a singularity.

A very large black hole's core is as big as your fingernail.

About as big as a pea.

The reason black holes are so insanely dangerous, is that their strength magnifies as their mass increases. They absorb mass. Making one on Earth is amazingly dangerous if control over it is lost. Considering that we do not know how to control one in the first place, making one in an area with considerable density is a very bad idea. Should it become powerful enough to absorb mass, it won't stop.

For a black hole to suck stuff in, it would need the mass of about 5 suns. The things we are creating are nowhere near massive enough.

There's a difference between absorbing mass over millions of kilometers of space and absorbing mass within metres and kilometres.

Hehe, this is so interesting... I wanna hear more lol.

Eh. I was going to say something to coloo but there's no point repeating other members.

Fascinating topic though, I never would have bothered looking up sonic black holes.

I don't think it is possible to create a sustainable black hole on Earth. A black hole needs to be of a certain mass for it to be able to maintain stability and the mass required is greater than the sun, let alone some test materials on Earth.