I think that's true. Here's more support for the idea that the brain actually uses quite a lot of energy: "Although the average adult human brain weighs about

I think that's true. Here's more support for the idea that the brain actually uses quite a lot of energy: "Although the average adult human brain weighs about 1.4 kilograms, only 2 percent of total body weight, it demands 20 percent of our resting metabolic rate (RMR)—the total amount of energy our bodies expend in one very lazy day of no activity." http://www.scientificamerican.com/article/thinking-hard-calories/ http://www.scientificamerican.com/article/thinking-hard-calo...