The X-Files, Season 1

Mulder:
We're all wired and hypersensitive, it'll be good to get a fresh start in the morning.

Scully:
Mulder, I don't want to waste a second trying to find a way to kill this thing.

Mulder:
I don't know if we should kill it. This area of the ice sheet was formed over a meteor crater. The worm lived in ammonia. It survived sub-zero temperatures. Theorists in alternative life-designs believe in ammonia-supported life systems on planets with freezing temperatures.

Scully:
No.

Mulder:
The meteor that crashed here a quarter of a million years ago may have carried that type of life to earth.