Each of these important model organisms reveals ancient secrets on the function of nervous systems, but this motley crew is too distantly related to help us model or predict adaptation.
Comparing many close relatives has many advantages:
Identify core mechanisms instead of species' quirks Distinguish natural selection from random noise Distinguish deep homology from uniquely-derived climate solutions Improve prediction for species whose brains cannot be sampled
We have selected 25 species that are abundant and accessible in the United States.
About half of these species are thriving in today's warming world, and the other half are declining, setting up an ideal contrast for our experiments.