The gravitational pull of the earth has a constant bearing on all living things. Animals with better sensory perceptions than humans can be often seen to detect subterranean disturbances like earth quakes well in advance than us, demonstrating this effect. The human body is programmed to be active during the day when food is to be consumed and digested within to form glucose, and to be resting at night when the glucose is absorbed into the bloodstream to generate energy, so that the person is charged with energy for another day’s activity; the reason why one feels refreshed in the morning after a good night’s sleep. The gravitational force applies itself on the human body at rest to expedite this process of re-energizing it. Our ancestors who slept on the floor or wooden cots benefitted from this phenomenon far better than we do sleeping on heavy mattresses. Orthopedic patients are known to find relief from pain by sleeping on hard, wooden cots for the same reason. Prostrating as a form of worship, practised by almost all religions, no doubt helps the body draw energy form earth. Regular sleep at night with the body well-supported horizontally in straight posture thus affects your health in more ways than one. Earth is also a massive reservoir of various minerals that human body needs for its sustenance and growth. In Nature’s way of things, water that springs from earth and plants that grow on it act as conduits to supply these minerals to humans who consume these.