Talking and thinking about DNA is so deeply ingrained now... well, it's IN our DNA.
But it's useful to remember that our knowledge of deoxyribonucleic acid and the way it shapes every living thing is relatively recent.
Life's Greatest Secret, zoologist Matthew Cobb calls it in his book by that name.
He makes the case that cracking the code of DNA profoundly changed the way we think about life.
The author joins us with the history of the discovery, and what led from it.