Roland Lehoucq is an astrophysicist at the French Atomic Energy Commission (CEA). He writes for the science fiction journal Bifrost and sponsors primary school classes to familiarize children with science.Loïc Mangin is the associate editor of Pour la Science. Jean-Sébastien Steyer is a paleontologist with the the National Museum of Natural History in Paris. He is the winner of the Paul Sangnier Prize and the Van Straelen Prize and a columnist in For Science and Species. Arnaud Rafaelian is an artist who lives in Paris.