graph LR 1["What is a Ledger"]-->0{"What is a Blockchain"} 0{"What is a Blockchain"}-->2["What is Ethereum"] 0{"What is a Blockchain"}-->3["What is a Blockchain Explorer"] 0{"What is a Blockchain"}-->4["What is Self Custody"] 0{"What is a Blockchain"}-->5["What is an Exchange"] 0{"What is a Blockchain"}-->6["How a Transaction Works"] 0{"What is a Blockchain"}-->7["What is a Hard Fork"] 0{"What is a Blockchain"}-->8["What is Bitcoin"] 0{"What is a Blockchain"}-->9["What is Mining"] 0{"What is a Blockchain"}-->10["What are Smart Contracts"] 0{"What is a Blockchain"}-->11["What is a Wallet"] click 1 "../What_is_a_Ledger" "What is a Ledger" click 2 "../What_is_Ethereum" "What is Ethereum" click 3 "../What_is_a_Blockchain_Explorer" "What is a Blockchain Explorer" click 4 "../What_is_Self_Custody" "What is Self Custody" click 5 "../What_is_an_Exchange" "What is an Exchange" click 6 "../How_a_Transaction_Works" "How a Transaction Works" click 7 "../What_is_a_Hard_Fork" "What is a Hard Fork" click 8 "../What_is_Bitcoin" "What is Bitcoin" click 9 "../What_is_Mining" "What is Mining" click 10 "../What_are_Smart_Contracts" "What are Smart Contracts" click 11 "../What_is_a_Wallet" "What is a Wallet"