Dr Mike Goldsmith studied the philosophy of time and space at Keele University, UK, where he also obtained his PhD in astrophysics. He was formerly the head of Acoustics at the UK's National Physical Laboratory and is now an author of non-fiction books for children, including the Kingfisher Space Encyclopaedia.

Rita Petruccioli was born in Rome in 1982. She attended the Accademia di Belle Arti in Rome and ENSAD in Paris. Her works have been exhibited in Italy, France, Germany and South Korea. She works as an illustrator and comic book artist for different projects including advertising, magazines, textile design and children books.

She has collaborated with different publishers such as Mondadori, Bao Publishing, Einaudi, Ladybird, Timbuktu Lab, Auzou, ELI, Lavieri, La Nuova Frontiera Junior, Il Castoro and Laterza. When she is not drawing she is engaged in workshops on gender stereotypes in comics.