Tonight, we look at one of the rarest things on earth — the dark of night — and learn that without it, earth is not only less beautiful, it is less healthy as well.
Creatures from babies in their cribs, to turtles in the sea, require dark to live. But, for reasons ranging from security fears to 24-hour gas stations, we have increasingly lit up our nights, to the point where most stars are now invisible to the naked eye. At the end of the show, we’ll tell you how Madison rates for darkness.
Paul Bogard, is the author of The End of Night – Searching for Natural Darkness in an age of artificial Light. He was interviewed by PNM producer Jim Carrier.
We checked with David Lorenz of the University of Wisconsin, who reports that, on the Bortle scale from 1 to 9 – one being the darkest – Madison rates 6. Because of our light pollution, very little of the Milky Way can be seen on clear nights.