And yet, in two million years, the human brain has nearly tripled in mass, going from the one-and-a-quarter-pound brain of our ancestor here, Habilis, to the almost three-pound meatloaf everybody here has between their ears.
از مغز هابیلیس که حدود نیم کیلو بوده است، به این تکه گوشت یک و نیم کیلویی که بین گوشهای ما قرار دارد رسیده ایم.