light-pollution
Light pollution is the excessive or misdirected artificial light from human activity that brightens the night sky, disrupting natural darkness and obscuring stars.
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After examining 13 million hours of light exposure data, researchers found that experiencing bright light during the dark hours can significantly increase the risk of heart failure and heart attack. The effect was most notable in younger adults. -
If you've noticed that you're hearing birdsong longer into your day than you used to, your observation fits with a study examining millions of hours of tweets and warbles. But just why are our feathered friends holding longer concerts?