Thanks to the miracles of genetic engineering, one day vegetables may very well give off light of their own. At this very moment, post-doctoral students at the University of Hertfordshire are attempting to cross the pine tree with genes from fireflies or fluorescent jellyfish to get a self-illuminating Christmas tree (just like the one Jesus had!). It would be a small step (I would imagine) to use the same technique on cucumbers or eggplant.

Of course, whether or not this is a good thing is entirely a matter of opinion.