Theories of How Life Began on Earth

1782 Words Dec 4th, 2010 8 Pages
Carolyn Godfrey
English 101
Ms. Lazzo
10/26/2010
Theories of how Life on Earth began
We certainly know that our universe exists, however, this knowledge alone has not satisfied mankind’s quest for further understanding. Our curiosity has led us to question our place in this universe and furthermore, the place of the universe itself. Throughout time we have asked ourselves questions such as: How did our universe began? How old is our universe? How did matter come to exist? Obviously, the search for clues has not ceased. Yet, after all this energy has been expanded, much of what we know is still only speculation. We have however, come a long way from the mystical beginnings of the study of cosmology and the origins of the universe. The
…show more content…
In a nutshell, as random genetic mutations occur within an organism’s genetic code, the beneficial mutations are preserved because they aid survival–a process known as “Natural Selection.” These beneficial mutations are passed on to the next generation. Overtime, beneficial mutations accumulate and the result is an entirely different organism, not just a variation of the original, but an entirely different creature. Darwin’s theory of evolution became a theory in crisis when advances were made in molecular biology, biochemistry and genetics over the past fifty years. We now know that there are in fact tens of thousands of irreducibly complex systems on the cellular level. Specified complexity pervades the microscopic biological world. Molecular biologist Michael Denton wrote. “Although the tiniest bacterial cells are incredibly small weighing less than 10 grams, each is in effect a veritable microminiaturized factory contains thousands of exquisitely designed pieces of intricate molecular machinery, made up together of one hundred thousand million atoms far more complicated than any machinery built by man and absolutely without parallel in the non-living world.
We do not need a microscope to observe irreducible complexity. The eye, the ear and the heart are examples of irreducible complexity, though they were not recognized as such in Darwin’s day. Nevertheless, Darwin confessed, “To suppose that the eye with all its
Open Document