If you toss a coin to decide whether to move backwards or forward and repeat, can you predict where you will end up? This question lies at the basis of random walks, the mathematics of how one can move by constantly choosing the next step at random. While this idea sounds a bit far from physics (and reality), it finds its origin in the microscopic observation of how grains of pollen move by Robert Brown. The concept of Brownian motion entered the toolbox of scientists in many fields and is now used in finance as well as in molecular biology. So, join me in this journey to discover how much of where we are going is just a “random walk”.