RED ALERT!!!! – THE HUMAN BRAIN HAS BEEN SHRINKING FOR THOUSANDS OF YEARS

6 ANSWERS

1. Brett
   

   Most people don't know this but the human brain has shrunk dramatically through the millennia of the history of mankind.
   
   Scientists are in some disagreement as to whether this shrinkage started thirtythousand years ago, or ten thousand years ago, but they agree that the brain has shrunk by 8-10%. The brain has in fact been shrinking for the past 100,000 years albeit at a slower rate.
   
   Another conundrum for evolutionary biologists is why the human brain 'evolved' to be so big in the first place! It gobbles up an extraordinary amount of energy. It only takes up 2% of our body weight, but uses 20-25% of our energy intake - far more than any other organ. The more the brain grows, the more energy and nutrients it takes away from other vital organs.

   Report (0) (0)  |   12 years, 8 month(s) ago  

2. Merlyn
   

   wait so then, if its getting smaller, I'm guessing that's a good thing! brains are probably cell phones.. they're getting smaller, but more energy efficient at the same time!

   Report (0) (0)  |   12 years, 8 month(s) ago  

3. Guest8782
   

   yeah rite.. it means ppl after a few years wont even have brains

   Report (0) (0)  |   12 years, 8 month(s) ago  

4. Guest4753
   

   its called EVOLUTION! as man has evolved to be a human from a monkey *says darvin*  so naturally everything evloves with time.. not a big deal!

   Report (0) (0)  |   12 years, 8 month(s) ago  

5. Guest8125
   

   I think that the brain is getting smaller, along with the heads in which it is encased, because humans are unable to do anything for themselves. Instead of walking to the library, you just sit yourself on a chair and get on the internet. No need for such big brains if they aren't even being used. Also for simple math equations, most people whip out their calculator for something simple that can be done by hand. I blame myself also for doing all of these things but what can you do? We're "evolving."

   Report (0) (0)  |   12 years, 8 month(s) ago  

6. Guest9583
   

   I think that the brain is getting smaller, along with the heads in which it is encased, because humans are unable to do anything for themselves. Instead of walking to the library, you just sit yourself on a chair and get on the internet. No need for such big brains if they aren't even being used. Also for simple math equations, most people whip out their calculator for something simple that can be done by hand. I blame myself also for doing all of these things but what can you do? We're "evolving."
   
   Sorry, forgot to login.

   Report (0) (0)  |   12 years, 8 month(s) ago