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.
If you've ever wished your building sets like Lego, K'Nex, and maybe even Mechano could all fit in with each other, this universal construction kit will make your dreams come true. That is, uh, if you've got a 3D printer handy.
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.