10,000 Year Clock
longnow.org
longnow.org
In case you wonder why this link to such a fantastic project gets so little response, it's been submitted many, many times, sometimes with significant discussion.
I still think it's brilliantly conceived, and completely bonkers.
I figured out so but I also thought that when I submit a link that's already been submitted it would take me to the previous submission rather than resubmitting it, or does it resubmit if there's a big time difference?
If you submit the exact same link, or a link that is sufficiently similar under some rules that are not made public (and hence I don't know), and if the previous submission is sufficiently recent, or in the cache for some reason, then yes, your "submission" will act as an upvote on the previous link, and you will be taken to it.
However, if:
* The link is not exactly the same, or
* the link is not "nearly the same", or
* the previous submission is not in the cache, then
your submission will be accepted.