Or, as Haldane wrote in “On being the right size” (https://en.wikipedia.org/wiki/On_Being_the_Right_Size https://en.wikipedia.org/wiki/On_Being_the_Right_Size:

Or, as Haldane wrote in “On being the right size” (https://en.wikipedia.org/wiki/On_Being_the_Right_Size https://en.wikipedia.org/wiki/On_Being_the_Right_Size: “You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes. For the resistance presented to movement by the air is proportional to the surface of the moving object. Divide an animal’s length, breadth, and height each by ten; its weight is reduced to a thousandth, but its surface only to a hundredth. So the resistance to falling in the case of the small animal is relatively ten times greater than the driving force”