Do algorithms run the world? Nowadays we measure the amount of data we generate in zettabytes - that's 1 followed by 21 zeroes. This data, in turn, powers algorithms that are getting more and more sophisticated at predicting our behaviour, and are making ever more decisions for us. What does this mean for our society, privacy, and even our inner selves? Plus, in the news, the science - or lack of it - behind the latest COVID "rule of six" guidelines; the Arctic ice shelf that's lost a Manchester-sized chunk of itself; and the whales that ended up tens of kilometres up an inland river... Like this podcast? Please help us by supporting the Naked Scientists