How Things Work - Fall 2013
Monday, September 16, 2013
Kilogram?
http://www.sciencedaily.com/releases/2007/09/070921110735.htm?fb_action_ids=10153248053250176&fb_action_types=og.likes&fb_ref=.UjeEhMeolkw.like&fb_source=other_multiline&action_object_map=%7B%2210153248053250176%22%3A10150124070081956%7D&action_type_map=%7B%2210153248053250176%22%3A%22og.likes%22%7D&action_ref_map=%7B%2210153248053250176%22%3A%22.UjeEhMeolkw.like%22%7D
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