Timothy E. McDevitt

“Oxygen comprises 21% of the Earth’s atmosphere. If oxygen were 25%, fires would erupt spontaneously. If it were 15%, human beings would suffocate.17 •​If the carbon dioxide level in our atmosphere were higher than it is now, a runaway greenhouse effect would develop. We would all burn up. If the level were lower, plants would not be able to maintain efficient photosynthesis. We would all suffocate.18 •​If the centrifugal force of planetary movements did not precisely match the gravitational forces, nothing could be held in orbit around the sun.19 •​If Jupiter were not in its current orbit, the Earth would be bombarded with space material. Jupiter’s gravitational field acts like a cosmic vacuum cleaner attracting asteroids and comets that might otherwise strike the Earth.20 •​If the rotation of the Earth took longer than 24 hours, temperature differences would be too great between night and day. If the period were shorter, atmospheric wind velocities would be too great.21 •​If the twenty-three-degree axis tilt of the Earth were altered slightly, surface temperatures would be too extreme.22 •​If the moon’s gravitational pull on the Earth were much greater, tidal effects on the oceans, atmosphere, and the Earth’s rotational period would be too severe for life. If it were less, orbital changes would cause climatic instabilities which would prohibit life.23”
― Timothy E. McDevitt, By Design: Evidence for the Literal Nature of Genesis and Why It Matters