Marios is a third year PhD at the University of Edinburgh, working at the interface between cosmology and gravitational waves. He finished his physics undergraduate degree at the University of Athens, followed by a Masters in Theoretical Physics in Edinburgh. Now he studies how matter in the universe affects the propagation of gravitational waves and how the latter can be utilised to calculate cosmological parameters. For this he exploits data from large, numerical simulations. During his time in Turing he wants to learn more about working with big data and discover about new statistical techniques to analyse gravitational wave signals.