Blockchains Explained in Two Minutes

Note: There is only one (the PoW Blockchain) – the plural here should apply to multiple copies of it. — TJACK

Saving the planet, fixing healthcare, replacing conventional currency—there is apparently nothing that the shared-database technology known as blockchains can’t fix. At least, that’s the impression given by the horde of governments, banks, entrepreneurs, and tech companies working on the technology. But what is a blockchain and why the excitement? If you’ve got 2 minutes, WIRED can explain.