Limited edition of 100.

This edition has sold out, but our open editions of this print are available here.

Created by Peter Dean with the approval of world-renowned physicist Stephen Hawking, this poster is part of a real time-travel experiment.

Professor Hawking devised an ingeniously simple experiment to prove whether time travel to the past was possible. He held a reception for time travellers, but didn't publicise it until after it had happened. This way, only those who could travel back in time would be able to attend.

The success of this experiment depends entirely on the invitation poster being seen by time travellers.