In essence, they are the rhythms of life. All forms of life on earth, including our bodies, respond rhythmically to the regular cycles of the sun, moon, and seasons. For example, as night turns into day, vital body functions, including heart rate and blood pressure, speed up in anticipation of increased physical activity. These and other predictable fluctuations in body function, taking place during specific time cycles, are our biologic rhythms. For more than 2000 years , the rhythmic nature of certain biological patterns have been observed.
Sea creatures are most susceptible to the waxing and waning of our moon.
The Moon affects the tides. The Earth's tides are caused by the gravitational pull of the Moon and Sun. The Earth bulges slightly both toward and away from the Moon. As the Earth rotates daily, the bulges move across the Earth. Since the Earth's water is more fluid than the land, it bulges slightly more, resulting in high tides.