Well, someone wrote the code in the DNA molecule. The more one studies life at the cellular level, the more one realizes that Darwin's theory of natural selection is woefully inadequate to explain how such complicated organisms came to be.
It simply could not have happened by chance.
Consider this: it takes roughly 150 precisely arranged amino acids to produce the most basic single celled bacterium that we know of. Those amino acids must be aligned in an exact ordered sequence. It's a code of sorts, and not a single amino acid can be out of place, or you don't get an organism.
Evolutionists would have us believe that over millions of years, random couplings of amino acids finally produced a combination of the exact right number, in the exact right sequence, that perfectly coded itself to produce the simplest bacterium there is.
Imagine a slot machine with 150 wheels on it. How many times would you have to pull the lever to hit the jackpot? And if you did hit the jackpot, what is the mechanism that would provide the pay-out (life)?
Even scarier for evolutionary biologists is the fact that that single celled critter has a fully developed DNA strand within it. Did those amazingly complex instructions just self assemble?
And we're only talking about the simplest form of life we can identify. Multi celled critters are more complex by orders of magnitude, to say nothing of plant and animal life.
The more scientists observe and understand the workings of life at the cellular level, the more they're having to face the fact that living things had to have been intelligently designed.
Yes. It has crossed my mind that DNA may be the finest example of nano-technology ever developed.