A perverted high school janitor. The kinds of janitors that are named Chuck, and, at football games, are also known as "Sergeant Chuckles" because of their undying school spirit. Most likely graduates of the same high school, but 30 years previous. Often known to compliment young female students by saying, "You look just like Jamie Lee Curtis! She's my favorite actress! I think she's really pretty!", or something of the like.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.