401
The dynamic windows of the Kiefer Technic Showroom by Ernst Giselbrecht + Partner.
402
Floating an iron anvil in mercury by @CodysLab.
403
French wingsuit BASE-jumper Vince Reffet intercepts and boards a Pilatus Porter aircraft mid-air.
404
Human-powered helicopter by the University of Maryland.
405
Closing the shading umbrellas at Medina Haram Piazza in Saudi Arabia.
406
A Congreve clock or oscillating path rolling ball clock uses a rolling ball instead of a pendulum to regulate time.
407
Self balancing cube by the Institute of Robotics at Johannes Kepler University Linz.
408
How birds were filmed for BBC's Earthflight documentary.
411
Flying a DC10 at perilously low altitudes to try to contain a forest fire.
412
A stevedore unloading intermodal containers from a container ship with a ship-to-shore crane.
413
Run-through rail car dumpers at the Port of Huanghua in Hebei.
414
The Bailong ("Hundred Dragons") elevator in Hunan, China is the tallest outdoor elevator in the world.
416
Controlled demolition of a silo by Dansk Sprængnings, filmed by Dronefoto Nord.
417
Mounting a haul truck tier with a Paladin Attachments / CWS loader tire manipulator.
418
Clearing a cupola furnace coke bed with track loaders.
419
Crab robot for filming red crab migrations on Christmas Island, by @JohnDownerProd.
421
Grassmayr bell foundry testing a bell for the Greek Orthodox Monastery of Mount Tabor.
423
Traditional mochi making with a kine mallet and usu mortar, via DELI BALI.
424
A "new sleep inducing invention for babies which also strengthens the leg muscles" from 1940, via
@AP_Archive
425
The infrared structured light projector of the iPhone X Face ID system viewed under night vision. via @reckless
Amazing feats of engineering. Tweeted by @kane and root.vc.