Energy Hog

Our brain is an incredible energy hog. The brain uses 11.2 watts per kg. Ordinary body tissue uses only 1.25 watts per kg. A typical adult human brain is 1.3 to 1.4 kg. That is one reason we did not evolve an even bigger brain. We could not scrounge enough food to support it.

~ Roedy (1948-02-04 age:69)