There's plenty still for us all to discover, despite John Horgan's thesis
Idea advanced 20 years ago that we are nearing end of science is far from coming true, with known unknowns aplenty
Are we nearing the end of science? That is, are we running out of answerable questions, leaving us with only some mop-up duty, working around the edges of the great scientific achievements of Darwin, Einstein, Copernicus and others?
This was the provocative thesis advanced nearly two decades ago by John Horgan, the writer, in his controversial book.
Naturally, professional scientists were aghast. Horgan all but said they were wasting their time on marginalia. A delightful romp of a book, it nonetheless suffered from the declarative nature of the title, which had the loud ping of overstatement: provocative yet insupportable.
There's a somewhat related line of argument that has been advanced by Stanford professor of medicine John Ioannidis.
Ioannidis published a paper in 2005 that said most scientific studies were wrong and that their results were not reproducible and likely fatally skewed by the unconscious desires of the researcher for a certain result.
He may be onto something. Last month, Francis Collins, head of the United States National Institutes of Health, and Lawrence Tabak, the institutes' principal deputy director, published a column in the journal stating that the scientific community needs to take steps to address "a troubling frequency of published reports that claim a significant result, but fail to be reproducible".
They list a variety of factors that lead to the lack of reproducibility, including the way some scientists use a "secret sauce" to make their experiments work and the way they withhold crucial details from publication.
But it's unlikely that science, as a whole, is going to run out of legitimate discoveries, and certainly there are questions to keep everyone in business into the distant future. In an article nearly 20 years ago, I listed five simple questions that many scientists might accept as a core curriculum of the unknown:
Why does the universe exist? What is matter made of? How did life originate? How does consciousness emerge from the brain? Is there intelligent life in other worlds?
The simplest questions are the hardest. For example, the origin of the universe isn't something you can reproduce experimentally, to test the "why" of it, and so even if you could detect the first sparks of the big bang you would know merely what happened and not necessarily why it happened. You would have correlation-causation issues.
The Large Hadron Collider, near Geneva, has been smashing particles in an effort to discern what the universe is made of, but the physicists are nowhere close to nailing that down. In fact, just the other day they announced, in effect, "We're going to need a bigger collider."
The origin of life is tricky because by the time you get anything big enough and robust enough and complex enough to form a fossil, you're already way, way past the point of origin. How do you get the first cell? How do you get rolling with this life business?
Consciousness may be an innately murky enterprise, and the issue of intelligent aliens remains completely speculative. Our big radio telescopes have heard not a peep so far. Maybe the Voyager spacecraft will bump into something out there in interstellar space (but don't count on it).
And there are other questions, too: how and when did humans migrate around the world? Talk about unknowns. Most of human existence was, and is, prehistoric, lost in the fog.
