Dimples

The golf ball was previously just a smooth round ball. When they added dimples on it, the balls hit went farther than before. The dimples must have minimized the friction. So when I think about it, there is similarity on the reason why fishes have scales and birds have feathers. Although I think those grooves are also designed for perspiration and release of body heat, they also makes them travel faster by distributing the friction and the wind forces acting perpendicular towards them.

This is just a theory. The nest step would be applying grooves on the body of cars and other vehicles to see if it is negligible. Not just simple grooves but grooves that are slightly raised to catch the wind from behind. Its like how the scales are designed to catch the waves behind it and same goes for the birds whose feathers catch the wind from behind to push them forward. Like an arrowhead. I think an illustration would provide a better explanation.

There, when the current is from behind the fish, the fish makes the scales rise so that they catch the wave. When it is infront, the alternate arrangement of the scales makes for distribution of friction. When the force is perpendicular, it is also distributed in four directions like a cross.

That's a car. When going against the wind, the friction is distributed through the grooves or the scales in fishes while when the wind is behind the car, the 'scales' open up to catch the wind. These 'scales' should be attached firmly because flying parts would be dangerous. They can fabricate molds for the body so that the grooves permanently etched. I think the faster the speed of the car and the stronger the wind speed will determine if this has effects or not. You think this is crazy or stupid?