First of all, llamas are the most superior intelectuals known to man. They rain 2nd (after kitties) in superiority. Llamas love all human beings and are happy to always call a cab for you when you are drunk. Never poke a llama because they are too busy looking at their vaginas with a handmirror. Llamas also knit the best scarfs.

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.