Happy 12-billionth birthday…give or take a few eons. The age of the universe is based on esoteric measurements of tiny pinpricks of light that are unimaginably distant and incredibly old. In “The History of the Evolving Universe: A Journey to the Brink of Space and Time,” Hubble space telescope scientist Mauro Giavalisco explains how science is inching its way back to the creation. At 7:30 p.m. at the National Air & Space Museum’s Einstein Planetarium, 6th & Independence Ave. SW. FREE. (202) 357-2700. (Greg Kitsock)

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