What type of event is the Homo Sapiens Sapiens and why is the chart to coarse to indicate what happened in the last 10.000 years?
Homo sapiens sapiens on first thought might've been a negative pressure, but now that I think about it, with all the radiation we've put into the environment I don't doubt if we've created even more.
I'd imagine data sampling is done via geological means, which is why the chart is so coarse.