Traxis shown by Unon to Jack and the Doctor. (COMIC: Weapons of Past Destruction)
Traxis was a class-9 planet with a population of 7.2 billion. A time fissure created a fault on the planet, bringing its past, present and future together. This caused mammoths, dinosaurs, Neanderthals and robots to appear all alongside each other. The Ninth Doctor was tricked into coming here to seal the rift with a temporal stabiliser. (COMIC: Weapons of Past Destruction)