Uralic languages are proven to form a genealogical unit, a language family. Not all speakers of these languages live in Siberia or have shamanistic religions. The largest populations, the Hungarians and Finns, live outside Siberia and are mostly Christian. Saami people had kept shamanic practices alive for a long time. They live in Europe, but practiced shamanism until the 18th century. Most others (e.g. Hungarian, Finnic, Mari) have only remnant elements of shamanism. The majority lives outside Siberia. Some of them used to live in Siberia, but have migrated to their present locations since then. The original location of the Proto-Uralic peoples (and its extent) is debated. Combined phytogeographical and linguistic considerations (distribution of various tree species and the presence of their names in various Uralic languages) suggest that this area was somewhere between the Kama and Vyatka rivers on the western side of the ural mountains.