A hard fork is when a cryptocurrency splits into two separate currencies. The first hard fork was Bitcoin Cash which was split from Bitcoin at block #478,558 on August 1st, 2017. Bitcoin forks and the forking of other chains became popular since then. We list hard forks for mostly informative purposes, but also because we see them as dividends and similar to an airdrop. We are not able to verify the safety or legitimacy of hard forks, so always be cautious and make sure to claim forks with the private key of an empty wallet.