They also performed a version of an experiment first conducted by Stephen Hawking in 2012, who sent out an invitation to a party after he’d already thrown it. Not surprisingly, no one traveled back in time to attend after they’d received the invitation. The Michigan Tech team decided to use Twitter hashtags instead. They asked people to tweet with #ICanChangeThePast2 and #ICannotChangeThePast2, then searched for messages including those tags that would have been sent before they put out the call to the would be time travelers. Unfortunately, none of their work turned up any evidence that there are currently people from the future in our midst.
via Engadget
