There's even wild differences between macroorganisms on Earth. Invertebrates are much more relaxed about number of eyes etc. We can go from "humans are the op

There's even wild differences between macroorganisms on Earth. Invertebrates are much more relaxed about number of eyes etc. We can go from "humans are the optimal form!", to "well, some kind of mammal", "c'mon, it's got to be a vertebrate", then get into the Cambrian experiment, go back further to different DNA (RNA anyone), then to different metabolic pathways, then to different organic biochemistry, then to non-carbon... and why should life have a chemical basis, anyway? So chemocentric. How can we tell when he go from too anthropocentric to too anti-anthropocentric? We have guesswork only. We're like a child rebelling against its parents. It seems to me, that elephants, dolphins, parrots, octipuses, and even spiders could have undergone the rapid brain-size increase that happened to some apes. (We don't even know why it happened to us.) They might still do so, in a few million years.