] We flood the heavens with so much artificial light that
] nearly two-thirds of the world's people can no longer see
] the Milky Way. On a clear, dark night far from
] light-polluted skies, roughly 2,500 celestial points of
] light can be discerned by the naked eye. For people
] living in the suburbs of New York, that number dwindles
] to 250; residents of Manhattan are lucky to see 15.
] Moreover, as the stars fade from view, a growing body of
] research suggests that excessive exposure to artificial
] night light can alter basic biological rhythms in
] animals, change predator-prey relationships, and even
] trigger deadly hormonal imbalances in humans.

Turn Down the Lights