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(Science News)   Scientists say that after growing larger for most of human history, human brains have gotten smaller in the last 3,000 years, due to spending more time around other humans. Politics tab, we're looking at you   (sci-news.com) divider line
    More: Interesting, Human, Ant, Human brain size, human brains, Evolution, rate of hominin brain evolution, Pleistocene, Human evolution  
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271 clicks; posted to STEM » on 28 Oct 2021 at 2:50 AM (5 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



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2021-10-28 2:54:54 AM  
Makes sense
 
2021-10-28 3:17:21 AM  
Personal hypothesis; it may also be influenced by long term settlements.  Agriculture.  Less hunting, less gathering.  The crops, animal husbandry, and cycle of the seasons.  Bit less involved than remembering hundreds of plants across a seasonal nomadic range.  Would also be a decrease requirement for spatial awareness, internal mental mapping, etc.

Changes like brain size don't happen overnight - but if XYZ parts of the brain are rarely/barely accessed/needed, I could see a gradual paring down to conserve energy.  Be interesting to see if specific regions can be tracked as reducing with current technology over the long term.
 
2021-10-28 3:55:15 AM  
Probably from helmet wearing
 
2021-10-28 4:09:31 AM  
Brain cells require twice as much energy as any other cell in the body. If an organism doesn't need extra brain mass for the species to survive, it's not surprising that smaller brains would reproduce as often and as well as bigger brains.

And since we know how to program drone helicopters to fly on other planets, I'm not inclined to think that extra mass was all that useful.
 
2021-10-28 5:52:31 AM  

DeadSeriousIdeaMan: Personal hypothesis; it may also be influenced by long term settlements.  Agriculture.  Less hunting, less gathering.  The crops, animal husbandry, and cycle of the seasons.  Bit less involved than remembering hundreds of plants across a seasonal nomadic range.  Would also be a decrease requirement for spatial awareness, internal mental mapping, etc.

Changes like brain size don't happen overnight - but if XYZ parts of the brain are rarely/barely accessed/needed, I could see a gradual paring down to conserve energy.  Be interesting to see if specific regions can be tracked as reducing with current technology over the long term.


Pretty sure it's Clevon's fault.

i.pinimg.comView Full Size
 
2021-10-28 7:30:18 AM  
But what about Leon?
 
2021-10-28 8:27:04 AM  
You don't use it you lose it.
 
2021-10-28 9:21:45 AM  
alvinalexander.comView Full Size
 
2021-10-28 3:53:54 PM  
Say, just out of curiosity -

Exactly WHEN did humans invent Religion?
 
2021-10-28 6:19:53 PM  
Consider the difference between the brain and the mind. The brain is a physical thing. It's inside your head. It's individualistic. The mind is the mix of all the symbols that make up human culture. It's the knowledge we share. To think, we use an alphabet, shared memories, recognized/anticipated outcomes. The mind exists outside the body. Our brains access it. The human mind is communal. With writing, with Google, we don't need to store as much on our own brains. Smaller-brained people can thrive.
 
2021-10-29 12:53:55 PM  

Dear Jerk: Consider the difference between the brain and the mind. The brain is a physical thing. It's inside your head. It's individualistic. The mind is the mix of all the symbols that make up human culture. It's the knowledge we share. To think, we use an alphabet, shared memories, recognized/anticipated outcomes. The mind exists outside the body. Our brains access it. The human mind is communal. With writing, with Google, we don't need to store as much on our own brains. Smaller-brained people can thrive.


Why do we believe the mind is real?
 
2021-10-29 1:32:38 PM  

dbirchall: Why do we believe the mind is real?


Something is reading and understanding this.
 
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