In one test of anxiety, animals were given the choice of staying in the relative safety of a dark box, or of venturing into a lighted box.
In two of the trials, the box was dark for 12 minutes and then illuminated for 48 minutes with either long-wavelength red light or short-wavelength blue light directed at the subjects' corneas. (Light color is determined by its wavelength.) The box was dark in a control experiment.
For the full Declaration, click on the link to the World Service website in the right-hand, dark-blue box.
He looks down and finds that the electrical cord leads to the television now a dark, silent box lying on the floor at his feet.
The above image is the Dark Souls 2 box art for the PC version of the game, which will be available the same day as the Xbox 360 and PS3 versions.
So will it live up to The Dark Knight at the box office?
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By the time you read this, countless shoppers have already returned home from sleepy-eyed, still-dark-outside trips to big box retailers after having one thing on their minds: saving money.
Pictures will not be reporting box office numbers for The Dark Knight Rises throughout the weekend.
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It was hard to talk about box office numbers for The Dark Knight Rises last week.
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Unless The Dark Knight Rises really surprises at the box office, The Avengers should end the summer as the highest-grossing film.
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U2's Bono and The Edge seemed to have initially bungled their Broadway debut with "Spider-Man: Turn Off the Dark" only to have it become a box-office success.
If a customer gripes that its telephone book is light on ink, Daly can look at a report on the print run and, if he sees that the last 1% of the run wasn't dark enough, tell the client to open another box because the rest of the run was fine.
Her two current movies, Zero Dark Thirty and the horror film Mama, topped the box office this weekend.
FORBES: It's Jessica Chastain's World, We're Just Living In It
The box-like eight-floor structure had dark brown bricks as facing tiles on the outside walls, a style that became popular in Shanghai in the 1930s.
WSJ: Architect László Ede Hudec Designed Shanghai's Art Deco Landmarks
Audiences continued to line up for "The Dark Knight Rises, " even as the North American box office slowed amid competition from summer Olympics coverage and the aftermath of the recent shootings in an Aurora, Colo.
After several mild weekends at the box office Hollywood finally had a bright spot with a very dark movie: The Devil Inside.
It's fair to say that Chastain's presence in both "Mama" and "Zero Dark Thirty" had little to do with each film's successful box office performance.
With a very big year at the box office anticipated with the one-two punch of The Dark Knight Rises this summer and Man of Steel this Christmas, the game developer is offering both super heroes in one game.
The film set records when it opened last weekend, becoming the third highest-grossing opening of all time behind The Dark Knight and Spider-Man 3 and the biggest opening of 2009, according to Box Office Mojo.
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