Hi folks. I'm slowly getting back to blogging here after a break, so I have more substantial posts in the pipeline. But while I'm working on those, I thought I'd point you to an interesting talk given by P.Z. Myers at The Amazing Meeting (TAM) this week.
The talk was "A Skeptical Look At Aliens" and takes a look at what scientifically plausible extraterrestrial evolution might look like. He points out that even here on earth we see a number of different body plans that are solutions to evolutionary "problems" like hunting prey in an aquatic environment. And that intelligence is rare and comes in different forms as well.
Myer' sums of what must be considered when thinking about the evolution of aliens as follows:
Myer' sums of what must be considered when thinking about the evolution of aliens as follows:
Evolution doesn't just make finely tuned functional organisms, but is also built on a foundation of chance, so it spawns endless diversity. Every advance carries along the baggage of its ancestry, so we see echoes of our past in every feature. And the more specific and complex a feature is, and intelligence is both of those, the less likely it is to emerge in the same form in different lineages.If we do find a planet with intelligent life, it is unlikely to be a humanoid or at all shaped like us. And we are unlikely to be able to easily find a way to communicate.
