Scientists don't know exactly what dark matter and dark energy are.
5) Incidentally, if anyone was wondering exactly how dark Harry Potter and the Deathly Hallows: Part 2 is, the answer is that it's really dark.
It's exactly the dark, desperate humour that this sequel needed more of.
Not about the conclusion – market share isn't exactly a dark horse – but about the arguments that are trotted out.
"I'm here, baby," one of them says, bringing into question where, exactly, the dark "here" of modern human contact lies.
And a Monday special of "crispy rabbit" ($28) that matched its description exactly: its dark, almost burned crust shattering open to reveal meat of nondescript flavor.
The staring becomes a looming presence over the course of the evening: not exactly a dark cloud, but always there, nonetheless.
What exactly this dark matter consists of exotic elementary particles, lumps of rock, failed stars, burnt-out stars, even small black holes is still a mystery, since the stuff itself is invisible.
Estée Lauder's creative director of make-up, Tom Pecheux, has designed a range for autumn called Blue Dahlia which includes a palette of pleasingly on-trend shades that can be blended according to exactly how dark and stormy you want to be.
What exactly is dark data?
