Chasing Darkness.

“How dark it would have been—imagine leaning out your door and, on the darkest nights, not being able to see more than a few feet in any direction. Historian Peter Baldwin describes as ‘downright perilous’ the streets in early American cities, with few paved and then those only with cobblestones…What lights did exist were intended only as beacons or guides rather than to illuminate the night. The New York street lanterns burning whale oil were, in 1761, merely ‘yellow specks engulfed by darkness,’ and, even more than 100 years later, its gas lamps were still ‘faint as a row of invalid glow-worms.'”

In Slate, Paul Bogart describes (and laments) the end of night all across the world. “With at least 30 percent of all vertebrates and more than 60 percent of all invertebrates worldwide nocturnal, and with many of the rest crepuscular, [the] implications are enormous.”