276
The @light_balance group performing on America's Got Talent in LED suits.
278
A demonstration of how sinkholes form, by Grady Hillhouse at Practical Engineering.
281
The Charming Bird watch by Jaquet Droz features a singing bird automaton.
282
A gelatin pill dissolving in water, by @macro_room.
283
The Tehachapi Loop on the Union Pacific Railroad Mojave Subdivision.
284
Testing the ground drain at the Kölnbrein Dam in Austria.
285
Kirigami paper toy by designer Haruki Nakamura.
287
Strandbeests are wind-powered kinetic sculptures by Dutch artist Theodorus "Theo" Jansen.
289
Carving a wooden coffee scoop by lucuscraft.ca
290
Time-lapse of the International Space Station releasing the Cygnus Orbital-2 cargo spacecraft.
291
A camera's frame rate synchronized with a bird's wings (thanks @chrisdotio)
296
Stunt pilot Melissa Andrzejewski flies under highliner Andy Lewis while motocross rider Jimmy Fitzpatrick backflips over the plane.
297
@nobumichi_asai Projection mapping onto a dress during a Jennifer Lopez performance.
299
Water bouncing off super-hydrophobic metal by @UofR.
300
Ant treadmill for research at University of Freiburg.
Amazing feats of engineering. Tweeted by @kane and root.vc.