301
Scharfenberg railway coupler at the Den Haag Hollands Spoor station in the Netherlands.
303
Dinosaur-themed demolition excavator operated by NorthStar working on @yalepeabody renovations.
307
The mechanized hidden floor rails of the Bugatti factory.
308
Uranium emitting alpha radiation in a cloud chamber.
310
Kinetic sculpture "Round Table" by Choe U-Ram at @MMCAKOREA.
311
Ball-balancing PID system by @link_johan.
312
@chrisdotio A camera's frame rate synchronized with a helicopter's rotor (thanks @coderzombie)
313
Ball balancing robot by Full Motion Dynamics.
314
The Gateshead Millennium pedestrian and cyclist tilt bridge.
315
Rolina the dairy cow in Habsburg, Switzerland uses a Schurr cow brush.
316
Fancy Japanese wood joinery. Check out @TheJoinery_jp for more.
318
The world's first complete front flip in a monster truck. Accomplished by Lee O'Donnell. Previous tweet incorrectly credited Tom Meents.
320
The IBM Selectric typewriter had a rotating and pivoting typing element that could be swapped for different fonts.
321
Slicing a drop of water with a hydrophobic knife.
323
Ferrofluid in the presence of a magnetic field around a bolt by @NileRed2
325
The Shihmen Dam releases water after Typhoon Dujuan.
Amazing feats of engineering. Tweeted by @kane and root.vc.