Two girls join a U.S. Air Force Academy professor on stage to snap carnations into tiny pieces with liquid nitrogen at the Colorado Springs Cool Science Festival.
An enthusiastic audience at a stage show in PETCO Park during the San Diego Festival of Science & Engineering's final EXPO Day.
MIT grad students providing a workshop for teens on the future of space travel during the 2009 Cambridge (Mass.) Science Festival.
Opening celebration of the 2010 Cambridge (Mass.) Science Festival, honoring the 50th anniversary of the LASER.
Science hits the streets at the Philadelphia Science Festival Science Carnival, in this case, creating a billowing cloud of water vapor from an experiment.
Ecologist and explorer Mark Moffett lets kids get up close and personal with a python following the Cool Jobs program at NYUs Skirball Center during the 2011 World Science Festival in New York.
The Science Cheerleaders, women with dual careers as both practicing scientists and cheerleaders for professional sports teams, at the 2010 USA Science & Engineering Festival.
The inaugural North Carolina Science Festival attracted more than 85,000 attendees to nearly 450 events throughout the state in 2010.
A father shows his son how to use an air cannon at a booth at the Las Vegas Science Festival Expo.
Pfizer researchers running experiments with attendees at a booth at the Cambridge (Mass.) Science Festival Science Carnival.
Racing hand-made "wind surfers" at one of the many booths at the inaugural USA Science & Engineering Festival Expo.
Video plays on the Jumbotron before a robot throws out the first pitch at a Phillies game during the 2011 Philadelphia Science Festival.
Closing night of the 2011 Cambridge (Mass.) Science Festival and the Festival of Art, Science and Technology.