Experimental event organised by Stephen Hawking
On 28 June 2009, British astrophysicist Stephen Hawking hosted a party for time travellers in the University of Cambridge. The physicist arranged for balloons, champagne, and nibbles for his guests, but did not send out the invitations until the following day, after the party was over.
The party was held at Gonville and Caius College on Trinity Street (52° 12' 21" N, 0° 7' 4.7" E) at 12:00 UT on 28 June 2009. In preparing for the event, Hawking said he hoped that copies of the invitation might survive for thousands of years, and that "one day someone living in the future will find the information and use a wormhole time machine to come back to my party, proving that time travel will one day be possible".
Invitations say that the reader is "cordially invited to a reception for Time Travellers" and that no RSVP is required.
Hawking waited in the room for a few hours before leaving, and no visitors arrived. He regarded the event as "experimental evidence that time travel is not possible".
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