(Paris, 1976) He took his doctorate in Physics at the University of Cambridge under Stephen Hawking. He likes to say that he still has the shirt that he wore when he researched black holes with the great scientist. He has now left the closed circles of academia to introduce a wider public to the mysteries of the universe. Since then, he has become a brilliant and rigorous popular scientist, appearing at conferences and on television programmes, and encouraging direct dialogue with his readers via his website (particularly the Ask Me About the Universe section). All his interests and concerns have been condensed into the titanic but accessible The Universe in Your Hand. It has become an international publishing phenomenon, named best scientific book of 2015 in France.