Water molecules would probably be it since they are in water and they are made up of two hydrogen and one oxygen.
Answer: He later observed a fourth star near the planet with the same unusual behavior. By Jan. 15, Galileo correctly concluded that they were not stars at all but moons orbiting around Jupiter, providing strong evidence for the Copernican theory that most celestial objects did not revolve around the Earth.
This would make it hard for a person to digest their food because enzymes are used to help speed up the process of its specific job
