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Humans are part of the ecosystem.
(mander.xyz)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

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This is a science community. We use the Dawkins definition of meme.
what's the cutoff to be in the 90%?
Wealth distribution pyramid has $100,000 as limit to top 7.7%.
https://en.wikipedia.org/wiki/Distribution_of_wealth
So $90,000 could be the cutoff.
Of course students don't have that. However I would include anybody into the top 10% who will own $100,000 at one point in their life which should be anybody with real estate or a private pension plan in the West.