DarkMatter

That's dark energy - and it does make sense if you get the real version not the potted pop science one. I'm told. --Requiem

Not really.  It all kinda boils down to "Well... we had this costant left over in our equations, and we don't like that, so we started theorising that there's something that fills that constant, and we dunno what it is yet, but we know a lot of things that it isn't..."  This is slightly seperate from the base energy - which says that what we call empty space has an arbitary energy value that we can't measure since we have nothing lower to compare it with.  Which is a slightly neater hack of a similar nature, and allows you to avoid DivisionByZero? and allows VirtualParticles? and other nifty things.  But it's still just a concept hack.  --Vitenka