Question of the Day
The average head weighs about eight pounds with the brain comprising about 3 of the eight pounds.
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Web Results
wiki.answers.com/Q/How_big_is_the_human_brain
Your brain is about the size of your two fists put together. The brain weighs about 3 pounds. The brains surface area is about four standard sheets of paper.
blogs.scientificamerican.com/guest-blog/2012/02/21/how-...
21 Feb 2012 ... New research points to an ancient energy tradeoff that meant more fuel for brains , and less fuel for muscles. Recently while visiting the National ...
www.guardian.co.uk/technology/2010/mar/28/colin-blakemo...
28 Mar 2010 ... Neurobiologist Colin Blakemore tells Robin McKie why he thinks a mutation in the human brain 200000 years ago suddenly made us a ...
www.livescience.com/5540-human-brains-big.html
13 Jul 2009 ... Social competition may be the main reason human brains are so big, researchers find.