426
Wolfgang Siess hang gliding near Interlaken, Switzerland.
428
Strength training machine designed for javelin thrower Christina Obergföll.
429
A large air cannon from the Czech show Wonders of Nature.
430
Leveling concrete with a Somero S-15R Laser Screed.
432
An E2 Hawkeye skids off the USS Dwight D Eisenhower when its arrestor cable snaps. Good save by pilot.
434
The Ghost Robotics Minitaur can open doors.
435
Sand-casting is a traditional process for producing lead sheets.
437
Self-serve bread-slicing machine at a Lidl grocery store.
438
Fractal jigsaw puzzle by Oskar van Deventer.
439
Bicycle with square treads by Sergii Gordieiev.
441
Generating plasma inside a syringe by @ElectroBOOMGuy.
443
Turning wheels of aging Latteria San Pietro Grana Padano cheese, via @nyccheesechick.
445
Omega Morgan transporting a transformer with a 360-foot, 48-axle trailer.
446
Test of a High Expansion Foam fire suppression system.
448
Stunt cameraman filming a chase scene in Tangiers for The Bourne Ultimatum.
449
A front end loader with tire chains working at a steelworks, via Kepçeci Mühendis ("Bucket Engineer").
Amazing feats of engineering. Tweeted by @kane and root.vc.