More light here on Earth is making it harder to see stars in the sky. The reason is brightness from artificial lighting that's been increasing for the past 12 years. A scientist with the German Research Center for Geosciences told the BBC our naked-eye view of the stars is disappearing. Researchers say so-called "sky brightness" has gotten ten-percent brighter every year since 2011. They say that means a child born in an area where 250 stars were visible would probably see fewer than 100 stars in the same area 18 years later.
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