Daniel Santos's Profile

, he believes, is

One big reason many searches don't succeed

What people need, Manber concluded about a year-and-a-half ago, is the information that would come "when an expert who knows this topic would tell you, if they had 15 minutes to explain."

Here's how Knol works. Experts in a given subject log into a Google account and use the Knol software to post an item, also known as a knol. In some senses, the process is like producing a blog post -- but in this case it's not something written off the cuff but carefully crafted to coherently explain a single subject.