This little book describes the past, present and future of black holes through a funny and engaging story involving Grandpa Louie, his two grandchildren and two of their friends.

During a beautiful sunny day on the beach, the children play, swim, enjoy their time, and ask a lot of questions to Grandpa Louie, a retired astronomy professor. Who better than him to tell all the secrets of black holes to a group of curious children? Who discovered them? What do "black holes" mean? Are There different types of black holes? How does a black hole form? What is his fate? How did scientists manage to "observe" these celestial bodies which, by definition, cannot be seen? At the end, we also bring up the subject of parallel universes, which could exist beyond the horizon of a black hole.

This book is suitable for children from 6 to 12 years old.

作者簡介：

Elena Ioli is an Italian theoretical physicist, teacher of physics at high school, science editor and author of physics textbooks and digital materials for educational purpose. She is member of the editorial board of the Italian science magazine Sapere. She studied black holes at the University of Bologna, Italy, and at Ecole Normale Sup�eure, Paris. She holds a Master in Science Communication from SISSA (International School for Advanced Studies) in Italy. She is author of a scientific essay about the role of metaphors in science communication (Le parole di Einstein, Dedalo 2007) and of a book about climate and global warming (Il clima che cambia, Dedalo 2020). In 2018 she took part in an international all-female scientific expedition to Antarctica about leadership and the physics of climate change.

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