Dr. Lucía Pérez-Díaz is an author-illustrator as well as an Earth scientist. She has spent most of her professional life researching what Earth looked like through time – which forms the basis of this reference title. Alongside this, science communication is paramount to Lucía. As well as her debut DK title How the Earth Works, she has authored science pieces for online magazines, taken part in science podcasts, and runs events for young people.