E=mc^2 may be the most famous equation in the world… but what you might not know is that it isn't the whole story. It just describes objects that have mass and that aren't moving. The...
Hi, my name is Shawn. I want to help you learn numbers. Let's count all the objects in my wagons. I have ONE(1) car. ONE(1) TWO(2) construction cones. ONE(1), TWO(2) THREE(3) drums. ONE(1), TWO(2),...