'We may be able to watch dark energy turn on': U-M involved in unprecedented sky survey

"Through the Dark Energy Survey, which began Aug. 31, more than 200 researchers from 25 institutions, including U-M, will search for answers to a fundamental question about the cosmos: Why is its expansion speeding up?"

This is a paragraph from the University of Michigan news service article "'We may be able to watch dark energy turn on': U-M involved in unprecedented sky survey." This survey, if successful, may shed light on the nature of the mysterious dark energy.

http://www.ns.umich.edu/new/multimedia/videos/21661-we-may-be-able-to-watch-dark-energy-turn-on-u-m-involved-in-unprecedented-sky-survey