I recently read a powerful book that argues for the existence of a creator based on the tiny world of the cell. Years ago, scientists thought of the cell as a primitive and simple thing–a glob of protoplasm. But discoveries have since changed this view. To help explain these amazing findings, Dr. Stephen Meyer, a former geophysicist and college professor who leads the Center for Science and Culture at the Discovery Institute in Seattle, wrote Signature in the Cell. The book looks intimidating since it has over 500 pages of information, but it is an important book that many should read. Meyer focuses on the importance of the discovery in 1953 of the information-bearing capacities of the DNA molecule, what he calls the “signature in the cell.” For the next several blogs, I’d like to walk you through the book.

His opening chapters define the scientific and philosophical issues at stake in the DNA enigma. Darwin had argued that the striking appearance of design in living organisms could be explained by natural selection working on random variations. But, thanks to Watson and Crick, scientists discovered the structure of DNA. They found that DNA stores information using a four-character chemical alphabet. This information is used to build crucial protein molecules and machines the cell needs to survive. This chemical alphabet functions like letters and a written language or symbols and a computer code. In fact, Bill Gates said, “DNA is like a computer program but far, far more advanced than any software ever created.” Of course, the key question is how the information in DNA arose. You have to have information before you can build the first living organism. In the mid-1980s a controversial book came out called The Mystery of Life’s Origin by Charles Thaxton, Walter Bradley, and Roger Olsen. These three scientists came to the conclusion that no theory had explained the origin of the first life. They suggested that the information in DNA might have originated from an intelligent source.

Next, Meyer describes the mystery surrounding DNA in more detail. He tells in depth the story of Watson and Crick as they set about to understand the structure of DNA. By the mid-1950s scientists soon realized that DNA could store an immense amount of information. Meyer ties this in with information about proteins — they build cellular machines and structures, they carry and deliver cellular materials, they allow chemical reactions necessary for the cell’s survival. To do all this, a typical cell uses thousands of different kinds of proteins, and each one has a distinctive shape related to its function. These proteins are made of smaller molecules called amino acids. The structure of proteins depends upon the specific arrangement of its amino acids, but the question was what determined the arrangement of the amino acids. It was Francis Crick who suggested it was the precise arrangement of the four-character chemical alphabet found in DNA that determined the arrangement of amino acids. Scientists soon found there were mechanisms in the cell to transcribe, transport, and translate the information in DNA so that amino-acid chains could be constructed at certain sites. Like a production facility at Ford, the cell uses digitally encoded information to direct the manufacture of the parts of its machines. You can see animation of this process at signatureinthecell.com or in the DVD called Unlocking the Mystery of Life. Here’s another mystery — it takes DNA to make proteins, but it also requires proteins to make DNA; so how did the whole thing get started? Which came first, the chicken (nucleic acids) or the egg (proteins)? The author says scientists must now explain the origin of three key features of life — DNA’s capacity to store digitally encoded information, the complexity of the information in DNA, and the cell’s ability to process the information.