Each of those desktops — also known as nodes — maintains a duplicate from the ledger, plus a consensus algorithm preserves the blockchain’s by making sure bogus or inconsistent copies are rejected. In 2005, the year of ETH Zurich's 150th anniversary, an intensive undertaking named "Science City" to the Hönggerberg https://nft-on-opensea20775.wiki-promo.com/69576/article_under_review