Friedrich Kautz, better known by his stage name Prinz Pi (fromerly known as Prinz Porno), is a German rapper living in Berlin. Prinz Pi is known for his enormous output and his sophisticated lyrics. In his songs he criticizes modern society, mocks the hipocritical attitude of many German rappers trying to be thugs & gangsters and expresses his hatred against the music industry and the brainwashing of the people via modern media. Prinz Pi started his career at the age of 19 with creating the mixtape "Porno Privat" which gained popularity within Berlin's underground scene, especially because of the track "Keine Liebe" (means "no love"). To this day, Prinz Pi has released about 500 tracks on more than 20 mixtapes/albums and is one of the few representatives of intelligent German hip hop. He also invented his own style of rap to which he referred to as dandy rap.

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.