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Hydrogen and methane balloons floating without helium science experiment (explosion!)

Watch a science experiment showing how balloons can float using methane and hydrogen instead of helium. See how hydrogen is ...
insider.si.edu

A Stage for science : dramatic techniques at science-technology centers : an examination of the use of drama and demonstrations to teach science museum audiences more ...

"Based on a workshop held in New Orleans, Louisiana, on February 1 and 2, 1979." siris_sil_133090 ...