breakfastmtn‘I Genuinely Am Upset That Your Kids Are Vaccinated’
https://piefed.ca/c/news/p/548748/i-genuinely-am-upset-that-your-kids-are-vaccinated
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UnspecificGravityA reminder that the human brain has not changed since modern humans emerged about 300,000 years ago.
Think about what that means.
The people who spent millennia throwing rocks at the moon, drawing stick figures on walls and hunting mammoths with pointy sticks? That’s just us. That is exactly what we would be doing in that time and place. The people that burned witches? That is us too. Those people had the exact same capacity for intelligence, compassion, and reason as we do.
What I am saying is that the capacity for human stupidity is boundless. It is our intelligence and civilization that defies our nature. We can always be dumber. We might not be able to get any smarter.
HellsBelleA reminder that the human brain has not changed since modern humans emerged about 300,000 years ago.
It has changed in shape but not in size. Source
Always a good thing to check the data before posting.
xepRecent studies suggrst our brains have shrunk:
www.frontiersin.org/journals/…/full
That theory has been challenged.
Discussion
DeSilva et al. (2021) propose that human brain size has decreased, and offer innovative reasons why this may be so, primarily focusing on a model of “group level cognition.” Our analysis of these data fails to find a decrease in human brain size over the last few thousands of years. When the large sample sizes of the most recent human samples are adjusted for, the pattern disappears, and the arguments no longer need to be invoked.
We argue that, when examining questions of micro-evolutionary change, the analysis and data need to be appropriate for the specific scale of that hypothesis. Further, the data need to be otherwise relevant for the hypothesis being tested (see Houle et al., 2011). Given that the adoption of agriculture and the transition to complex societies occurred in different times at different places, the samples need to be specific enough to test the hypothesis across different times and populations, which does not appear to be the case in this instance.
Frontiers | Did the transition to complex societies in the Holocene drive a reduction in brain size? A reassessment of the DeSilva et al. (2021) hypothesis
Encephalization has long been understood to be a key adaptation in the human lineage, and over the last four million years species attributed to Australopith...