sleep
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Growing use of LED street lights may be hurting our sleep habits
Watch: Episode 7: How flies might help us understand human circadian rhythm
X-Men, step aside: Check out real-life mutants with these 5 amazing superpowers
Why is a company that makes a drug for blind people spending millions on TV ads?
Need a good night’s rest? Choose therapy over pills, doctors group says
Groggy after a night in a hotel? Blame the left side of your brain
