Did you know that Professor Stephen Hawking held a party for time travellers back in 2009?
He didn’t tell anyone about it, so that if guests did turn up they would have had to have read about it in the future, found a worm hole and nipped back.
A plan which, as no-one reportedly made it, effectively cut out of the loop all those people who might have dressed in tin foil and pretended to be time travellers in order to partake of the pigs in blankets, or whatever nibbles Hawking offers at these bashes.
Anyway, the invitations have now been released and are there for the purchasing from kite.com.
If you buy one, you must display it for eternity, or at least until a descendant invents time travel.