On 2021-03-11 17:12, jim bell wrote:

Phys.org: Breaking the warp barrier for faster-than-light travel. https://phys.org/news/2021-03-warp-barrier-faster-than-light.html Jim Bell's comment:. Not quite 'Star Trek' level, but...

The proposal describes a warp bubble, traveling faster than light, involving immense amounts of energy. But creating the warp bubble in the first place, and getting out of it without forming a black hole and getting gobbled up by the black hole, would appear to involve a surface of infinite blue shift, which requires shock wave in space time of infinite energy density.