Which of the following is not a hypothesis for how life began?
◦ Asteroids and comets brought amino acids to Earth.
◦ Outgassing and related volcanic materials brought proto amino acids to the surface of the earth.
◦ Methane and hydrogen sulfide from deep-sea hydrothermal vents and hot springs like those at Yellowstone National Park provided the necessary materials.
◦ Methane and ammonia in the early atmosphere combined with the help of lightning or ultraviolet light to produce the first amino acids.