You'd think not a single one could ever work a zipper.

Some individual humans invented air travel, heart surgery, and the internet. Some individual humans can also merge in traffic. Most humans can do none of the above.

The human race invented the word for air, they invented the things to travel , they invented surgery not the heart, they invented the things that run the internet. And yes they even invented the way to merge in traffic does it mean they learned nope.

That's a wheel issue. To many wheels on the vehicles.

There ARE simple rules of the road that no one today bothers to learn. Merging: the vehicles ON the highway are to hold their speed and position, the merging vehicle is to vary its speed accordingly to enter flow of traffic. When done right works just like zipper. [German heel click!]

Most people are retarded. Yes, mankind accomplishes great thing's. But peoples stupidity also knows no bounds.