And we told you we're close. So now let's talk about other sciency things we were promised that haven't happened yet. I mean, I was promised time travel in 1985. I'm waiting for my time travel.
Not really. Any time machine that isn't also a space ship or can guarantee it lands on Earth in another time period will kill its occupants. Very few time machines actually have this ability, but with the TARDIS it's built into the name. And since it predates most other space travelling time machines it gets the credit for being the first.