New LED-based streetlights are whiter than traditional ones and contain more blue light, which can disrupt people’s circadian rhythms.
The American Medical Association (AMA) issued guidelines for communities to reduce harmful effects of LED streetlights. A medical researcher explains what can go wrong.
World map of artificial sky brightness.
F. Falchi, et al. Science Advances (2016)
Eighty percent of North Americans can no longer see the Milky Way at night. But the problem with light pollution isn't just about stargazing.
Men seek out male doctors, but are actually more honest with females.
Men can expect to die approximately five years sooner than women, but why? One possible explanation is men are more reluctant to go to the doctor – and less likely to be honest once they get there.
Clinton greets breakfast diners in South Carolina.
Black women turn out to vote like no other demographic group, and they overwhelmingly vote Democratic. So who are they going to back in the southern primaries?
Since 2009, record sales have soared.
'Records' via www.shutterstock.com
While technological advances have rendered some products obsolete, they've also spurred the growth of niche markets that cater to people looking to reject mass-produced goods.
Donald Trump speaks at the South Carolina Tea Party Coalition Convention in Myrtle Beach.
Insults are tossed about in an election year but the word "demagogue" has a particular bite. But what is a demagogue and how do the 2016 candidates compare with demagogues in history?
Creativity is a valuable skill. Why is it ignored in the admissions process?
A recent report, Turning the Tide, urges colleges and universities to reexamine their admissions process. What about measuring creativity?
Daisy Ridley plays the character Rey.
20th Century Fox
The manic light-and-sound show is more tribute than groundbreaking film.
Not dark enough.
People in bed via www.shutterstock.com.
Is electricity making us sleep less? A new study on sleep in preindustrial societies suggests the answer is no. But it misses a big point: people in preindustrial societies spend more time in darkness than we do.
En matière d’antioxydants, le mieux est l’ennemi du bien. Un trop fort dosage fait peser un risque sur la santé. Choisissez plutôt une belle salade.
In The Martian, the stakes are neither bigger, nor smaller, than a single human life.
20th Century Fox
Review: stranded on Mars' desolate landscape, a cocky, endearing protagonist breathes life into this survival tale.
Maybe not so good?
Pills via www.shutterstock.com.
If the antioxidants that occur naturally in food are good for us, that must mean antioxidant supplements are also good for us, right? Not quite.
Why isn’t there a Late Show with Ellen Degeneres?
Studio heads are hesitant to give a woman the reins of a late night show. Are they pandering to their target audiences?
A juvenile male black-throated mango hummingbird (
Anthracothorax nigricollis) extending his tongue after drinking nectar.
By filming these ultra-speedy feeders at transparent fake flowers, researchers finally figured out how hummingbirds slurp up the nectar so fast.
Don’t stay up too late.
Mice via www.shutterstock.com
How does one prove that shift work causes breast cancer, as the authors of the new study claim? A cancer epidemiologist explains how scientists weigh evidence to figure out what causes cancer.
It’s good for you.
Blood donation via www.shutterstock.com.
After years of conflicting research and often extreme opinions on iron, it turns out that like anything else that is a benefit in moderation, in excess it is a detriment.
While we search for a cure, we are still searching for cause. A volunteer hangs bras during a promotion against breast cancer in Switzerland in 2008.
Major causes have been identified for most common cancers, like liver and lung. But we still haven't identified one for breast cancer.
Turn that off.
Light bulbs via www.shutterstock.com.
Today, most of us get too little light during the day and too much at night for our circadian rhythm to function at its best.
Once upon a time it was an eternal indestructible friendship
The remnants of the Cuba-Soviet relationship are still very much part of Cuban culture – a fact on display at this month's Miami International Film Festival
Alejandro G. Inarritu’s Birdman took home four awards, including Best Picture.
Indies to the rescue, the quiet power of foreign language films, Gen-X's crowning moment. All – and more – are covered by our experts, who weigh in on this year's Oscars.