"Growing bigger brains had other consequences. Gray matter is the gas-hog of our bodies. A fifth of the calories you consume go to fuel your brain. Within a million years of the Dikika baby our ancestors learned to supplement the mostly vegetarian diet of Lucy and her kin with nutrient-packed meat, devising stone tools to strip flesh and crack bones for the protein-rich marrow. Good nutrition made even bigger brains possible. And that led to more inventions, and then bigger brains. The rest is history." ha ha

sweet find, martha. it's pretty sad that this didn't even translate into a news blurb here.