“If time travel is possible, where are the tourists from the future?”
More from Stephen Hawking
“Stephen Hawking: [introducing themselves for the first time] Hello. Jane Hawking: Hello.…”
“Jane Hawking: What do cosmologists worship? Stephen Hawking: A single unifying equation…”
“Jane Hawking: So, I take it you've never been to church? Stephen Hawking: Once upon a…”
“I'm sorry. I did my best.”