We’ve all been there. Clear morning, quiet terminal. You’re a little early to your gate, and you’re watching the ground crew do their thing. Rationally, you know this works. It always works. But somewhere deep inside, there’s that small, primal part of you. It sees those tiny people working on that giant, manmade, metal bird. “There’s no way in hell,” it whispers, “something that big gets off the ground.” And yet every day, around the world, thousands do.