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This giant T-shirt cannon can shoot how far?!

Our favorite internet engineer Mark Rober is back! This time he works with a 12-year-old kid to create the world’s most powerful T-shirt cannon. You won’t believe how far this thing can shoot. This is a fun one to watch with the whole family, including any young inventors.

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New eBook: ‘Cryptocurrency 101’

Don't want to lose your dough to crypto? Check out my new eBook, "Cryptocurrency 101." I walk you through buying, selling, mining and more!

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