An artwork jointly created by a robot and a human artist will go on sale this week. The artwork, known as an NFT, is to be sold during an online auction on Tuesday. NFT stands for non-fungible token. It is a piece of art that only exists on a computer technology known as blockchain. A blockchain is an online database containing information that can be used and shared within a large network open to the public. The technology permits blocks of information to be checked and stored safely. NFTs can exist in the form of images, video, music, and text. They are usually bought with electronic money. While anyone can view NFTs, the buyer has official ownership rights over the objects.