"Fossils of ancient behaviors" is brilliant. I can't believe I never thought about that, great example.

I'm going to drift a little offtrack for a moment, but I don't expect it to go too off topic. I've read in Wired that they're working on altering the genome of chickens by looking at specific DNA markers and trying to revert them to be more like their reptilian ancestor. I can see technology progressing so that we can use computers to look at possible previous genomes of humans and what kind of psychologies the genome could create.... The only problem here is the complex interactions between humans and the environment, but it would be a great leap forward for evo-psych I think.