It is often said that science must avoid any conclusions which smack of the supernatural.

For example, both humans and chimps have a broken copy of a gene that in other mammals helps make vitamin C. ... It's hard to imagine how there could be stronger evidence for common ancestry of chimps and humans. ... Despite some remaining puzzles, there's no reason to doubt that Darwin had this point right, that all creatures on earth are biological relatives.

In many biological structures proteins are simply components of larger molecular machines.

Many people, including many important and well-respected scientists, just don't want there to be anything beyond nature. They don't want a supernatural being to affect nature.

The trap does not work until all the parts were there. The system itself doesn't work until you fit all of them together.

It is a shock to us in the twentieth century to discover, from observations science has made, that the fundamental mechanisms of life cannot be ascribed to natural selection, and therefore were designed. But we must deal with our shock as best we can and go on.

Proteins are the machinery of living tissue that builds the structures and carries out the chemical reactions necessary for life.