Report on Approved Bioscience Experiments for Apollo - Effects of Weightlessness on Isolated Human Cells

I would like to begin by reviewing for the moment some thoughts about gravity. Gravity has been with us always, and like most things that are with us always, we tend to devote little time and attention to it. Gravity literally rules the universe. It holds the Sun in its position. It keeps the Earth in its orbit about the Sun. It maintains the orbits of the planets, of the galaxies and, as far as we know, is a major force throughout the entire universe.