The Cambridge Science Festival is the first and only full-scale celebration of science and technology in the United States. During nine days in April, the City of Cambridge erupts with 200 free & open events designed to excite, engage and educate the public.
Official Website: http://cambridgesciencefestival.org
Added by Erik Mallinson on April 16, 2008
Erik Mallinson
The events are actually all over cambridge but the opening festivities are free and in front of City Hall, 12pm - 4pm.