Psilocybin actually decreases blood flow and connections in the brain rather than stimulates. Can a decrease in blood flow cause the brain to increase over time? http://boingboing.net/2011/04/15/shrooms-limit-brain.html

Also, the human brain has actually been decreasing over the last 30,000 years yet we are still becoming smarter: http://news.discovery.com/human/shrinking-brains-intelligence-110207.html

From what I've read of Terrence McKenna on wikipedia it seems that his theory is based more on speculation and spirituality than science.

http://en.wikipedia.org/wiki/Terence_McKenna

I totally would have believed this theory without researching until he started talking about aliens. Whenever aliens get involved in a theory of our evolution it sets off my bullshit detector.

"visual acuity"
wow fascinating
"bonding with family"
huh, makes sense
"aliens"
...ಠ_ಠ

Hahaha...Joe Rogan is a hoot about aliens. I totally disagree with him on it, but he makes some interesting claims. Alas, interesting ≠ true

On the first article...maybe shrooms gives us an insight into what it's like to experience dying? I hope not, my shroom trips are always scary >> ^Fusionaut:

Psilocybin actually decreases blood flow and connections in the brain rather than stimulates. Can a decrease in blood flow cause the brain to increase over time? http://boingboing.net/2011/04/15/shrooms-limit-brain.html
Also, the human brain has actually been decreasing over the last 30,000 years yet we are still becoming smarter: http://news.discovery.com/human/shrinking-brains-intelligence-110207.
html
From what I've read of Terrence McKenna on wikipedia it seems that his theory is based more on speculation and spirituality than science.
http://en.wikipedia.org/wiki/Terence_McKenna
I totally would have believed this theory without researching until he started talking about aliens. Whenever aliens get involved in a theory of our evolution it sets off my bullshit detector.