301
Camera drone disguised as a hummingbird to film monarch butterflies for @PBSNature.
303
A riding mower attachment for cutting around posts.
304
Ferrofluid clock uses magnetic liquid to tell time.
306
Ferrofluid in the presence of a magnetic field around a bolt by @NileRed2
307
Soft robotic gripper by the Biomechanics and Soft Robotics Lab at Beihang University.
308
A modular concert hall at the Schermerhorn Symphony Center in Nashville.
309
Removing burned pizza crust with a Milwaukee M18 FUEL grinder. twitter.com/Cursed_warlord…
311
A trichroic beam splitter separates white light into red, green, and blue light.
312
Rolina the dairy cow in Habsburg, Switzerland uses a Schurr cow brush.
313
Uranium emitting alpha radiation in a cloud chamber.
315
Restarting the engine of a Piper J3 Cub by hand.
316
A mercury-arc valve converting alternating current to direct current.
317
Repairing a run in knitting with a small latch hook.
318
Filming rally driving is sometimes as impressive as the rally driving itself.
319
Opening a bottle of 1961 Château Pétrus with heated port tongs to avoid crumbling cork.
320
A peeler lathe turns a tree into plywood veneer.
321
Time-lapse of emptying a bulk carrier with a chain bucket ship unloader.
322
Octopus kites at the Emmen Kite Festival.
323
The Stuntronics robot is being developed by Disney to stand in for actors during dangerous stunts.
324
Pilot Martin Sonka during the 2017 Red Bull Air Race in Porto, Portugal.
325
Necrobiotic spider gripper by @ProfDanPreston at the Rice University Department of Mechanical Engineering.
Amazing feats of engineering. Tweeted by @kane and root.vc.