a necklace of coral islands

In an original effort to show at reduced speed the movement here recorded, the films were viewed in a kymoscope […]

With PoW, as new, unverified transactions become available or broadcast to the entire blockchain network, each node that maintains a copy of the ledger (also known as a “miner”) verifies a set of those transactions to prevent so called “double spending”.

Now, sailors love marvels, and love to repeat them. And from many an old shipmate I have heard various sage opinings, concerning the phenomenon in question.