Pristine /prĭs′tēn″, prĭ-stēn′/ adjective
- Remaining in a pure state, without human alteration. "a pristine stream."
- Remaining free from dirt or decay; clean. "pristine mountain snow."
- Of, relating to, or typical of the earliest time or condition; primitive or original.
What is the evidence?
I could swear that I can see some plastic bottles and condoms laying around on planet "c"...