Topic: artificial light

(STR/AFP Photo/China OUT/Getty Images)

Fireflies: on the road to extinction

Anthony Warmack - Massive Science
(<a href='http://www.shutterstock.com/gallery-518803p1.html'>chungking</a> via <a href='http://www.shutterstock.com/'>Shutterstock</a>)

We're ruining the sky!

Lindsay Abrams
(Boris Tylevich/Flickr)

Lindsay Abrams
(radioedit/Flickr)

Lindsay Abrams