WHY DOES ONE OF THE SAFEST COUPLINGS IN HISTORY LOOK SO UNRELIABLE? 🤔🤯 At first glance, it seems like this railroad coupler is about to fall apart. But it is precisely thanks to this small amount of play (looseness) that it became one of the safest designs in railway history. The Janney automatic coupler automatically connects cars, absorbs shocks during movement, evenly distributes the load throughout the train, and helps reduce the risk of derailment. It is a simple engineering solution that

The kids grabbed our magnet tiles and built a whole coin path straight down the front of the fridge, ending in a little triangle catch at the bottom. The goal was to get a coin from the top all the way down into that triangle. Then we pushed it further, how many coins could we stack into it before the weight finally won and the whole thing collapsed? We tested quarters, dimes, nickels, pennies, all of it. Quarters won every single time. They rebuilt that path over and over, moving one tile a few

This tiny magnetic blob could change how we treat brain tumors forever...