A recent study by Columbia University Irving Medical Center analysing biological clocks across the human body suggests that both — too little sleep and excessive sleep may accelerate ageing in multiple organs, including the brain, heart, lungs, and immune system. “Previous studies have found that sleep is largely linked to aging and the pathological burden of the brain. Our study goes further and shows that too little and too much sleep are associated with faster aging in nearly every organ, supporting the idea that sleep is important in maintaining organ health within a coordinated brain-body network, including metabolic balance, and a healthy immune system,” says study leader Junhao Wen, assistant professor of radiology at Columbia University Vagelos College of Physicians and Surgeons.…