Back to Basics: Reader Asks How We Know DNA Exists, What It Does

Here's a thoughtful inquiry from a follower of Discovery Institute's work, who recently asked us a basic but obviously important question: How do we know that DNA exists, and how do we know that it functions to carry genetic information? He also asks how we know what molecular machines like the nuclear pore complex look like.

Today, molecular biology is so advanced that it's not every day that we think about these questions. As scientists push forward the frontiers of biological understandin...