Whats a block?
Discussion
> Blocks hold batches of valid transactions that are hashed and encoded into a Merkle tree.
β [Blockchain - Wikipedia](https://en.m.wikipedia.org/wiki/Blockchain)
Define Merkle tree, please
> Blocks hold batches of valid transactions that are hashed and encoded into a Merkle tree.
β [Blockchain - Wikipedia](https://en.m.wikipedia.org/wiki/Blockchain)
Define Merkle tree, please