So where do we get the energy to run our big brains? Reduced gut size? More body fat? The way we move? Debate rages on despite new data

Link: So where do we get the energy to run our big brains? Reduced gut size? More body fat? The way we move? Debate rages on despite new data

Half a million years ago, the human brain started expanding. Bigger brains need more energy to keep trucking, but scientists have been stumped as to where we found this extra juice when our metabolic rate, which is how we churn out energy, is on par with our pea-brained cousins.

One recent theory suggests that our brain’s need for energy was fed by a smaller gut, since an easier-to-digest diet would free up energy from the gut to build up the brain. New research suggests this might not be the case, that storing energy in our fat deposits is more important.