Paradox

A group of scientists are experimenting with time travel, and they manage to send one of their group ahead in time one hour. But when he comes back, he tells them that they’ll all be dead within the next hour unless they shut the machine down.A group of scientists are experimenting with time travel, and they manage to send one of their group ahead in time one hour. But when he comes back, he tells them that they’ll all be dead within the next hour unless they shut the machine down.