Doctor Who: 10 Secrets Of The TARDIS You Need To Know
4. It Prevents The Doctor From Aging
With the Time Lords being the ancient and mysterious race of all powerful, time-hopping super geniuses, you would think that the fact that The Doctor doesn't really ever seem to age is part of his natural biology.
In reality, Time Lords do in fact age, albeit much slower than the average human being, and yet The Doctor has often managed a few centuries of time travel without ever seeming to add a single wrinkle to whichever face he so happens to have at the time. The reason for this is that a Time Lord forms a symbiotic bond with their TARDIS after travelling with it, and it is that bond that both stops the pilot from ever aging while also preventing the TARDIS itself from decaying and withering away.
If you're looking for the ultimate anti-aging formula, the Doc has got the secret. Look at that youthful face...