We should have a clearer idea when the results from the Dark Energy Survey and its massive 570-megapixel camera are published in five years' time.

BBC: Getting the measure of dark energy

That kind of talk was common during what Iraqis call the "dark years" when the sectarian warfare was at its worst and al Qaeda and other extremists controlled swaths of the country.

CNN: Analysis: Baghdad weary amid pullout and death

Nelson has created a beautifully moving look at a dark time in America, when government suspicion of even its most lustrous citizens could escalate into threats against their personal freedom and livelihoods.

WSJ: Review: 'Nikolai and the Others' bittersweet drama

The book takes an entertaining dramatic twist towards its end, when Jennings finds out that his childhood fishing mentor harbors some deep and dark secrets.

FORBES: Notable Fall Sports Books

"Einstein's theory of general relativity tells us that mass bends space and time, so when light comes toward us through the Universe, if it passes some dark matter, its light gets bent and the image we see gets bent and distorted, " Dr Heymans told the meeting.

BBC: Dark matter hints in widest-yet view of dark mystery

When you walk away again, they go dark, the handles retract and the car enters its stealth mode.

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