Doonesbury by Garry Trudeau for July 23, 1982
Transcript:
Mike: Looks like a scorcher today, Zonk. Shouldn't you give your extra terrarium a good soaking? Zonker: Oh, no, Mike. A terrarium is a closed system. As teh water evaporates, it condenses on the glass and recycles itself! We're talking very low maintenance here, Mike. You just give a terrarium a little companionship, and he's as happy as the proverbial clam! Right, E.T.? Plant: E.T. loves Zonker! Mike: He certainly seems happy.