[pnpnp]

Was this really its best hope? I still have my fingers crossed for an Alcubierre drive using antimatter as an energy source.

Hasn’t work been done in this area recently? I remember seeing an article saying it might technically be possible with a hilariously large energy source, but I don’t know if that has been disproven.

[aardvark179]

So what’s going to provide your negative energy density, given it isn’t going to be antimatter now, and that was our best candidate?

[aldousd666]

Antimatter was to be used to generate the energy required, by annihilation of regular matte, not the antigravity itself. "Exotic matter" is undefined as of yet in that it could still exist as something else. Some people are confusing the two ideas, even though some (few) people probably did actually think anywhere would anti-gravitate, as it were.