As stated in some early post the anthropic principle speaks to how finely tuned Earth is for life. Why is that important? How can a natural process create something so specific? If you walked in your kitchen and you saw a message written in cereal that said "take out the trash...mom". Would you assume natural causes created that message? If you saw a watch laying in the grass would you assume natural causes created it? If I drop red, white, and blue confetti out of a plan, do you think it would form the American Flag if it landed on your lawn? Of course you would answer the preceding questions no because of the specificity of the designs would necessitate that it had to have an intelligent designer. The point I am making is that you have a higher probability for each of the previously stated things happening by natural causes than this world being created by natural causes. The design of this world is more complex (irreducibly complex) than anything. Listed below are 10 things (referred to as constants) to show how complex Earth is... now ask yourself... could a natural process create some this specific.
1. If the centrifugal force to planetary movements did not precisely balance the gravitational forces, nothing could be held in orbit around the sun.
2. If the universe had expanded at a rare one millionth more slowly than it did, expansion would have stopped, and the universe would have collapsed on itself before any stars had formed. If it had expanded faster, then no galaxies would have formed.
3. any of the laws of physics can be described as a function of the velocity of light (now defined to be 299,792,458 meters per second). Even a slight variation in the speed of light would alter the other constants and preclude the possibility of life on earth.
4. if water vapor levels in the atmosphere were greater than they are now, a runaway greenhouse effect would cause temperatures to rise to high for human life; if they were less, an insufficient greenhouse effect would make the earth too cold to support human life.
5. If Jupiter were not in its current orbit, the earth would be bombarded with space material. Jupiter’s gravitational field act as a cosmic vacuum cleaner, attracting asteroids and comets that might otherwise strike earth.
6. If the thickness of the earths crust were greater, too much oxygen would be transferred to the crust to support life. if it were thinner, volcanic and tectonic activity would make life impossible.
7. If the rotation of the earth took longer than twenty four hours, temperature differences would be too great between night and day. if the rotation period were shorter, atmospheric wind velocities would be too great.
8. The 23 degree axle tilt of the earth is just right. If the tilt were altered slightly, surface temperatures would be too extreme on earth.
9. if the atmosphere discharge (lighting) rate were greater, there would be too much fire destruction; if it were less, there would be too little nitrogen fixing in the soil.
10. if there were more seismic activity, much more life would be lost; if there were less, nutrients on the ocean floor and in river runoff would not be cycled back to the continents through tectonic uplift. (yes, even earthquakes are necessary to sustain life as we know it)
There are over 100 constants in this world. The slightest change in any of them would cause life to cease on Earth.
Thursday, August 28, 2008
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