Thursday, January 05, 2006

Strogatz's "Dangerous Idea" and the Nature of Insight

Disclaimer: My background is in biology and I have no right to comment on mathematics. That said, I will proceed to do so.

Edge.org has once again asked over a hundred prominent scientists and other thinkers a provocative question. This year, the question was, "What is your dangerous idea?".

Steven Strogatz's answer is particularly intriguing. Strogatz, of network and complex systems fame, comments on the use of computers in mathematical proofs, writing "we're able to figure out what's true or false, we're less and less able to understand why". Somehow, to him this means that "insight is becoming impossible". He concludes,
When the End of Insight comes, the nature of explanation in science will change forever. We'll be stuck in an age of authoritarianism, except it'll no longer be coming from politics or religious dogma, but from science itself.
But what is insight and do computers threaten it? Mathematical facts -- theorems -- automatically come with explanations -- proofs. In other sciences, however, facts and the theories that explain them are distinct. Rocks fall. The Galapagos Islands have 14 slightly different finch species. I submit that insight is what it takes to go from these sundry observations to the theories of evolution and gravity.

The first step in science is making observations. Mathematicians have not traditionally been able to do this, at least not as an initial step. Now they can, and the nature of the discipline may approach that of the other sciences. Facts may get ahead of structures of thought and require ex post facto explanations. Is this really a tragedy?

There is one more response to Strogatz' worries. Computers, for all their power, do what they are programmed to do. No computer can test a conjecture that did not originate in a human brain or answer a question that a human did not ask. Surely there's room enough for insight in questioning and conjecturing.

Saturday, December 31, 2005

How Much of an Explosion was the Cambian Explosion?

A very cool new post on Pharyngula examines new research attempting to work out the phylogeny of animal phyla. As a bonus, there's an important place for fungi in this work -- always a good thing. More on the fungi below.

The researchers compared the sequences of 50 genes in 9 phyla to try to create a family tree. (I am under the impression that this is way more genes than are normally used for systematics. Is this correct?) Some of the branch points could be resolved fine, but it was not possible to distinguish branching times for others. Various modifications, detailed in the Pharyngula post, didn't help. The conclusion? The Cambrian explosion 543 million years ago was quite rapid, so branching times are too close together to be sorted out by the methods used.

As one of their tests of this idea, the investigators tried the same techniques on fungal phylogeny, since fungal evolution appears to lack anything like the Cambrian explosion. Walla! The methods worked just fine, producing a clean and reasonable family tree. This research agrees with the fossil record, suggesting that the Cambrian explosion was a real event.

Now, anyone who can refer to events that took tens of millions of years as an "explosion" is either a geologist or an evolutionary biologist. The term is confusing to laypeople and plays into the hands of creationists. "Rapid adaptive radiation" is too technical, plus the word "radiation" doesn't help. My poetic side wants to borrow Brian Swimme's renaming of the Big Bang and call the event the "animal flaring forth", but that suffers from the same problems as "explosion". How about "animal branching out"?

Guardian Unlimited | Special reports | US boy's answer to a school essay on Iraq: take a trip to Baghdad

Guardian Unlimited | Special reports | US boy's answer to a school essay on Iraq: take a trip to Baghdad

Farris Hassan is one of the coolest people I have heard of in a long time. In an earlier age, he may have run off to be a sailor or have become an explorer. Yes, going to Baghdad is a dangerous thing to do. Precisely for this reason, it takes savvy and daring.

In this safety-obsessed society, we need kids like Hassan. I wish him well.

Sunday, November 13, 2005

Evolve -- A Song That Gets It Right

A group in the Pacific Northwest, Gaia Consort, performs music that might be described as secular pagan folk rock. One of their songs, "Evolve" has got to be the coolest thing I've heard in a long time.


Life teaches life teaches life teaches life
One thing: evolve

Not only does this make me think of Chris Adami's work on increasing information content in evolution (although Adami, at least in what I've read of him, doesn't specifically address co-evolution), it really appeals to the ecology buff in me. Living things adapt to one another, whether in arms races or mutually beneficial relationships. "Life teaches life" is a beautiful way of saying this.

There's a full-length live version of the song on the Gaia Consort homepage (scroll down). I might use it for a celebration of the origin of life.

Tuesday, November 08, 2005

Hello World!

OK, so I really ought to be studying for a physicochemical biology midterm. Instead, I'm creating a blog. I've thought about starting one for a while, so you'd think it could wait -- but have this weird habit of doing things precisely when I don't have time to do them.

I am a student, an ecology geek and interested in life, the Universe and everything. (Really -- I'm a member of UCLA's Astrobiology Society.) The idea is to search for patterns and try to put things together. Expect posts on ecology, space, world citizenship, big history, bizarre connections, speculations and a fair amount of miscellany.