Gravity On The Playground! - Mr. Wizard's Challenge
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Learn about gravity with Mr. Wizard!
Subscribe now for more science, nature and technology clips from the 1980's Nickelodeon show, Mr. Wizard's World, every week on #WizardWednesdays.
http://bit.ly/mrwizard
Subscribe now for more science, nature and technology clips from the 1980's Nickelodeon show, Mr. Wizard's World, every week on #WizardWednesdays.
http://bit.ly/mrwizard
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