They've tried with explosions and impalement and poison, among other things. Can't be done. My species name refers to the fact that I can't be killed.

[So there.]

It's possible the Trumps might de-contaminate us when we get back. They wouldn't want to make all their little toys sick, I'd hope.

[Yet he still sounds troubled.]

Or we could de-contaminate here if we get off of this planet.