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blogs.discovermagazine.com...
It's not that new by the looks of it...and it's man made anyway...also...I don't think it's a black hole as such...it's just that the refractive properties of the substance bend the light to such a degree where it won't escape...optical fiber sort of does a similar thing because it needs to keep light inside, until it reaches the other end, and the light is transformed back into electrical signals...it's very different to how a black hole works...they just keep the light bouncing around inside the metamaterial most likely...
Metamaterials are artificial materials engineered to provide properties which "may not be readily available in nature"
discovermagazine.com...