The NY Times has an interesting commentary [1] on a recent Science paper [2]. The net of it is that the Permian-Triassic Extinction event [3] 251 million years ago eliminated a significant majority of species and forced most of those that remained into a "mobile" framework to find food. This ultimately lead to much of the animal diversity you see on the planet today.
I.e. were it not for this event animals (and you and I) might not exist. The species that remained as "plants" (immobile) adapted to this by evolving increasingly complex genomes. Most people don't realize it but complex plant genomes are *larger* than animal genomes. The lack of mobility drove a diversification at the genome level -- you have to evolve genes to deal with whatever nature (weather, fungi, insects, birds, etc.) throws at you where you stand. One can argue that mobility enables genomic simplicity.
<br><br>Now, species at the time were incapable of forward thought. Astrophysical processes handed them a wakeup call and they adapted as best they could. *We* on the other hand see the future coming. *We* have very good ideas as to how it will evolve towards the limits allowed by physics. But "we" are 1000 people out of 6 billion [4]. One must ask whether another "great dying" (to quote the NYT) is coming [5] and whether mobility is the path to survival or whether like the plants we can evolve ourselves to a point where "U can't touch this." [6]?
<br><br>Robert<br><br>1. Revkin, AC, "Marine Life Leaped From Simple to Complex After Greatest Mass Extinction", NY Times (26 Nov 2006)<br><a href="http://www.nytimes.com/2006/11/28/science/28mari.html?pagewanted=print">
http://www.nytimes.com/2006/11/28/science/28mari.html?pagewanted=print</a><br>2. Wagner, PJ <span style="font-style: italic;">et al</span>, "Abundance distributions imply elevated complexity of post-Paleozoic marine ecosystems",
<br><span style="font-style: italic;">Science</span> <span style="font-weight: bold;">314</span>:1289-92 (24 Nov 2006)<br><a href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=17124319&itool=pubmed_docsum">
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=17124319&itool=pubmed_docsum</a><br>3. <a href="http://en.wikipedia.org/wiki/Permian_extinction">http://en.wikipedia.org/wiki/Permian_extinction
</a><br>4. I'm making this number up. It would be *nice* if the "powers that be" would post the number of subscribers to the ExICh list in the monthly summary!<br>5. Those over 60 not signed up for cryonics are dead. Those under 40 are probably guaranteed a seat unless something really bad happens (an AGI overlord perhaps?). For those of us in between its luck-of-the-draw.
<br>6. <a href="http://en.wikipedia.org/wiki/U_Can%27t_Touch_This">http://en.wikipedia.org/wiki/U_Can't_Touch_This</a><br><br>