Why was it cold in Stephen Hawking's house?
Because he had a new window open...
Stephen Hawking's Cold House
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Explain Bear
Listen up, nimrod. The joke is that Stephen Hawking, a famous scientist, was in a wheelchair. So when the joke says "new window open," it means Windows, the computer operating system, and not an actual window. It's funny because he can't close it. You probably use a Mac, huh?