One is the informed assumption that the vast majority of life forms in our galaxy are based on carbon chemistries, as are all life forms on Earth.
Iyat dǎɣ asnat ataqal isalan isakna aɣel ina təmɣire hariwat ən əmikan ən təmudre dǎɣ etran nanaɣ aqalnen aygan fal əhimie ən əarbone, sund dak əmikan ən təmudre fal Akal.