According to a recent study, it turns out that our human ancestors might have had the ability to hibernate through the colder months. They say might have, because after the thousand or so intervening years, it’s hard to say for sure. That said, evidence like bone structure and growth over time leads scientists to believe there were longish periods of time when humans stayed in once place and ate very little. [T]hese extinct hominins suffered annually from renal rickets, secondary hyperparathyroidism, and renal osteodystrophy associated with Chronic Kidney Disease – Mineral and Bone Disorder (CKD-MBD). Modern humans don’t have the capability to either store enough nutrition, to burn enough fuel over time to keep our bodies working, or to expel waste safely while asleep to be able to hibernate.