There's a law of physics that prevents you from going back in time. Time travelers who went back to the Titanic to see its sink are what actually sunk the Titanic. The real question is if they're, oh, Stephen Hawking held a party for all time travelers of the future. And he said if you're a time traveler, we will expect you to show up right in front of me. Because it's Stephen Hawking. He's sitting there in his wheelchair and everybody's around. And they got an open summoner and nobody appears. So that could mean that a time machine will never be invented in the future or it's been invented but not yet used.
What do you wish you’d learned in school? On this episode, Neil deGrasse Tyson and comic co-host Chuck Nice go back to school to answer questions about simulation theory, time dilation, white holes, the sound of space, and more!
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Photo Credit: NASA/ESA and The Hubble Heritage Team (STScI), Public domain, via Wikimedia Commons
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