A blockchain is a growing list of records, called blocks, that are linked together using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree). The timestamp proves that the transaction data existed when the block was published in order to get into its hash. As blocks each contain information about the block previous to it, they form a chain, with each additional block reinforcing the ones before it. Therefore, blockchains are resistant to modification of their data because once recorded, the data in any given block cannot be altered retroactively without altering all subsequent blocks.
invented by Chris Messina
The use of hashtags was first proposed by Chris Messina in a 2007 tweet.
invented by Satoshi Nakamoto
The pseudonymous Satoshi Nakamoto launches the first popular cryptocurrency, an…
invented by J. Craig Venter Institute
Mycoplasma laboratorium or Synthia refers to a synthetic strain of bacterium.
invented by BioNTech Pfizer
An mRNA vaccine is a type of vaccine that uses a copy of a molecule called…
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