Some folks at MIT are holding a time-travelers’ convention. The idea is to make it so famous and so widely-known that even thousands of years in the future, people will still know exactly when and where this time-traveler convention went down, and will all come travel to it at some point in their illustrious time-traveling careers.

Can’t the time travelers just hear about it from the attendees, and travel back in time to attend?

“Yes, they can! In fact, we think this will happen, and the small number of adventurous time travelers who do attend will go back to their “home times” and tell all their friends to come, causing the convention to become a Woodstock-like event that defines humanity forever.

Unfortunately, we of the present (2005) don’t have time travel, and so we only have one chance at observing the convention. If the time travelers don’t leave us their secrets, we won’t be able to go back in time and see our convention in all its glory unless it is publicized in advance.”

More here.