The act in which a group of old female friends go out without their old fart husbands. Old gals' night out usually begins slow with dinner and drinks at a restaurant. The evening picks up when the old gals get soused and end up closing down the local nightclub.

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.

The act in which a group of older women friends go out without their old fart husbands. Old gals' night out usually begins slow with dinner and drinks at a restaurant. The evening picks up when the old gals get soused and end up closing down the local nightclub.