Israeli horticulturists have developed a gothic crossbreed of tomato that is red on the inside, black on the out. To create the 'Black Galaxy' tomato, the breeders crossbred tomatoes with wild varieties. The dark colour comes from a pigment similar to one found in blueberries. The pigment is photosensitive so the longer the tomato is left on the vine in the sun, the darker it gets.
(Via The Presurfer.)