[OS] Piston Engine, Artwork By Thomas Bayrle Titled “Rosenkranz” - 2009 [1.024×1.430]

Apposed cylinder aircraft engine [potato quality] [1600 × 1200]

Source: https://openpics.aerobatic.io/

Open Pool Nuclear Reactor

Source: https://imgur.com/nFn1aB2

Making a crankshaft

A well used inside micrometer

Source: https://imgur.com/js550IJ

This photo illustrates the excellent insulating properties of aerogel. The crayons on top of the aerogel are protected from the flame underneath, and are not melting. [369x441]

Source: https://openpics.aerobatic.io/

(via P-748622.png (506×340))

Electricity Finding the Path of Least Resistance on a Piece of Wood.

(YouTube)