From the homepage of the site:

> The Long Now Foundation is a nonprofit established in 01996 to foster long-term thinking.

Seems that it's adding a zero to make you think of the future, and thinking over long periods of time. Looking at scales of thousands of years instead of tens or even hundreds.

It's a Long Now thing - emphasizing that they are thinking/talking about problems on millennia timescales. They also did the 10000yr clock: https://en.wikipedia.org/wiki/Clock_of_the_Long_Now

To subtly imply that the articles are of such sublime quality that they will still be referenced in 10,000 years.