Skipping stones takes a little practice and finesse, so Mark Rober enlisted his extended family to help build the perfect rock-skipping robot. Their creation, named Skippa, ended up helping humans learn, too.
I built a rock skipping robot with the help of my nieces and nephews to understand the perfect way to skip a rock. In the end we learned that 4 things matter most:
1) Rock angle of 20 degrees
2) Rock PATH angle of 20 degrees
3) Spin the rock as much as possible
4) Choose a rock that is flat on the bottom and as heavy as possible for you to still get to your max arm speed.
• Rock Skip Robot- The SCIENCE of PERFECT ROCK SKIPPING (YouTube / Mark Rober)
Thirty years ago today, the Voyager 1 spaceprobe had completed its ncounters with the outer planets and was careening out of our solar system. The time came to shut off the probes’ cameras to preserve power and memory for the other onboard scientific instruments. But before engineers flipped the switch, one last photo opportunity was […]
While scientists have studied Moon rocks for 50 years, researchers have for the first time conducted deep analysis on a single grain of lunar dust, atom by atom. Using a common materials science technique called atom probe tomography that’s not widely used by geologists, the Chicago Field Museum’s Jennika Greer and colleagues probed the grain […]
This is so amazing. Watch what happens when a blacksmithing anvil is lowered into a large vat of pure liquid mercury. Update: One of our readers posted the link to the original video in the comments. I have replaced the animated GIF. Thanks, Crispy75. [H/t Alberto Gaitán via Bryce Lynch] Image: Screengrab from GIF
Spring cleaning time is right around the corner, and, if we’re being honest, the whole thing is kind of a drag. But keeping your home clean in any season is necessary for both health and happiness, so why not make it a little less daunting? The correct tools help make any work easier, and that’s […]
Quality knives matter — and in more ways than you might expect. At the most basic level, having a functioning set of proper kitchen knives means you can actually get in a kitchen, start putting together a meal and have the right tools to handle all tasks. From the blunt force of the clever to […]
You kill it at the gym all week, your nutrition is dialed in, and you’re drinking so much water that your spare time is spent walking back and forth to the bathroom (way to get those steps in!)—so how do you take things to the next level? By focusing on recovery. A proper post-workout routine, […]