Due to numerous factors, humans today may have lost certain metabolic efficiencies that safeguarded early existence. Depending upon a hunter-gatherer’s foraging success, daily survival for homo sapiens was most often shaped by the biodiversity of available food sources, foraging behaviors that provided an abundance of daily exercise, and distinct periods of intermittent fasting. This was due to living in a world filled with unpredictable food supply.
Paleontologists suggest our evolutionary path morphed to human-like bodies with elongated legs and shorter arms over a million years ago. So, the earliest adaptation was learning how to live life on the ground. Although they lost tree-climbing skills, their new bodies needed to absorb nutrients on a faster, more regular basis just to meet the physiological demands of burning food to fuel a taller body with a larger brain. Evidence also exists of campfire hearths used for heat where food was likely shared.
