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Just the fact that we've pushed back the point where early hominids were controlling and cooking with fire to some 2 million years in the past. Burying dead to 250,000 years.

I'm totally willing to believe there are much earlier signs of what we would call complex societal behavior like those temples and the infrastructure required to build them. We're just going to get better at detecting and dating it as time passes imo.

It's sad that we will likely never know why they did any of this stuff. It's probably all very familiar to us even now, but wouldn't it be fascinating to know how far back our "modern" behaviors go.