We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
It would seem to be the satirical name for they've theoretically calculated that there is so much energy in the universe but the energy-counters can't find, apparently 69% of it. Thus, they've made an entry into the ledger labeled "Dark Energy", or energy they can't see.
Darkness doesn't exist. It is simply shorthand for absence or dimness of light to the extent we can't see what we "know" is there. Someday, perhaps we'll find some way to shine a "light" upon this energy and it will cease to be dark.
I blame the massive government funding of research. The influence of so much government has infected the scientists with the lazy habit of labeling things they are suppose to have but can't find in hopes no one notices they don't really know what they are doing. Or simply hiding it all in the "black" budget items.
Alternatively, religion was right and evil really exists. We can now measure its influence upon our world and calculate that it is growing, consuming the way of light, dominating the universe. In other words, the shadows are real, the darkness can engulf and, as we know, nothing good comes from that.