Homemade balloon sends pictures from the upper stratosphere!

This is really cool.  A homemade balloon with an HD camera, handwarmers to keep the battery warm, and  an iPhone (for the GPS) all cozied up in a styrofoam box was sent up into our atmosphere.  Amazing footage!  And these guys needed to know about how atmospheric pressure would affect their balloon, how to prevent their balloon from spinning in high winds, and how to create the perfect parachute for its descent.  They must have paid attention during their science class!

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