Hal Walker: The Man Who Shot The Moon
b'In addition to flying, landing, and returning from the moon in 1969 \\u2014 NASA\'s Apollo 11 crew helped with a series of scientific experiments. One of them was to leave a special instrument with lots of little reflectors on the surface of the moon. The goal of that experiment was to beam a laser at the moon. Today on the show, Scientist-In-Residence Regina G. Barber talks to host Aaron Scott about the lunar laser ranging experiment \\u2014 and how shooting that laser helped us better understand one of Einstein\'s theories.
Follow Aaron on Twitter @AaronScottNPR and Regina @ScienceRegina. Reach the show by beaming an email to ShortWave@NPR.org.
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