Just because it's the weekend doesn't mean you have to switch your brain off completely. Smarter Every Day continues its video series on the physics behind helicopters with a look at how choppers use something called a swashplate to vary the pitch of its rotor blades to climb higher and fly in any direction.
Carl Groover is the Maverick of RC helicopters. He does things with a miniature chopper that seem to defy the laws of gravity and physics. It will seriously blow your mind, and not just because you lost an hour of sleep this weekend.
Destin over at the Smarter Every Day video blog has done it again. This time he shows you gun-lovers how to take incredible photos of muzzle flashes. The rig he's built has impeccable timing, and the results are amazing.