Similar to the over-the-shoulder boulder holder, the mosquito net is a device worn by women on the breast. However, unlike the over-the-shoulder boulder holder, the mosquito net serves no conceivable purpose, as it is placed on top of small breasts (mosquito bites) and thus has nothing to hold up.

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.