Knol, different from wikipedia

Every article is written by different people, and can't be edited by anyone but the author.

It put emphasize on the author, I think that's important. It's like blog post, it gets comments and people always love comments.

I always believe there should be more encyclopedia like wikipedia. Knol is useful when you want to know how to backpack. Wikipedia tells you what is backpack.

It may be a closer step for Google's mission " to organize the world's information and make it universally accessible and useful."