New dawn or new dusk? Beyond the binary of day and night

In the first week of April 2011 The International Dark-Sky Association celebrated

International Dark Sky Week, an annual event raising awareness of how artificial

lighting is rapidly destroying the dark sky at night. In the same week, in post-tsunami

Japan, debate emerged about whether to introduce unusual daylight-savings regula-

tions and force companies to shift operating hours for workers to relieve the stress

on the country's crippled power plants.