100.000 feces samples from around the world will be stored in a special Swiss bunker.
By the way, the same type of vault also exists for plant seeds in Svalbard, Norway.
Source: https://www.swissinfo.ch/ger/wissen-technik/the-microbiota-vault_eine-arche-noah-fuer-unsere-darmflora/47278160
Photo: https://www.pexels.com/de-de/foto/dunkel-tunnel-u-bahn-beton-5421773/