Gravity has been a constant force throughout evolutionary history on Earth. The architecture of all life on Earth – including the human body – is adapted to the gravitational force.
Thus, it is one of the fundamental biological questions, whether and how life on Earth requires and responds to gravity at a functional cellular and molecular level. Is gravity a condition for complex life? Is gravity a condition for the existence of mankind? Ultimately, research in microgravity helps to comprehend one of the biggest questions – to understand life on Earth.