But even granting that this self-regenerating energy were as vigorous as formerly, and that it has not more to do battle with now than heretofore, there is another and more serious question behind.

Olds and Milner constructed new experiments that allowed the rats to press a lever. Each time the lever was pressed, an electric current stimulated the pleasure centers of the rats' brains. The rats would go into a pleasure-seeking frenzy, pressing the lever as many as 2,000 times an hour. They would ignore food and water, working themselves into a state of exhaustion and starvation. Eventually, they would die. They literally pleasured themselves to death.

When a wave mounds on the outside and takes its shape, a surfer quickly paddles to the peak, positions himself in its evolving momentum, swings his board around, aligns with the peak, and thrusts himself into its cascading shape.

There is more scholarly investigation being done on Otomanguean languages and other languages of Oaxaca today than ever before, yet unlike other groups such as Uto-Aztecanists and Mayanists, Otomangueanist and Oaxacanist scholars.