Backyard Water Rocket With a catch & release mechanism, you can get higher pressure--with significantly higher flights! This version will be safer, especially with small kids around. (Popular Mechanics)

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Record-Breaking Mariana Trench Dive - James Cameron's Deep Ocean Dive, Diagrammed - Popular Mechanics

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Use a bench vise to hold spherical stock, like bearings. This is from Popular Mechanics, but I do not read enough Spanish to track down the precise original publish date.

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DeWalt's 20V Cordless Power Tools and Re-envisioned Hand Tools - Popular Mechanics

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