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You could see anything 14.7 billion miles away if you were able to see the Andromeda Galaxy with your naked eye. If you drove at 70 mph, it would take more than 356 billion years to reach the nearest star. The first stars are thought to have formed 200 million years after the Big Ban...
(Phys.org) —Popular television shows such as "Doctor Who" have brought the idea of time travel into the vernacular of popular culture. But problem of time travel is even more complicated than one might think. LSU's Mark Wilde has shown that it would theoretically be possible for time trav...