Robert Song is a Christian ethicist based at Durham University in the United Kingdom. He studies the moral implications of medical interventions such as gene editing.

Anders Sandberg is a research fellow with the Future of Humanity Institute at the the University of Oxford. He studies the ethics of human enhancement. 

Aubrey de Grey is the co-founder and chief science officer of the SENS Research Foundation, an organization dedicated to the study of radical life extension. He is based in Cambridge, U.K., and Mountain View, Calif.

Jane Mellett is a parish pastoral worker in the Archdiocese of Dublin. In 2018, she tweeted every line of Laudato Si’ to President Donald Trump to protest his environmental policies.

Bastiaan Rutjens is an assistant professor of psychology at the University of Amsterdam. He studies what leads to distrust in science. 

Florence Raulin Cerceau is a director at Messaging Extraterrestrial Intelligence and an associate professor at the National Museum of Natural History in Paris. She is a historian of astrobiology and of the search for intelligent alien life.

Lewis Dartnell is an astrobiologist and a science communicator at the University of Westminster in London. He gives frequent lectures on the search for intelligent alien life, what it might look like and want and how it might change us. He is the author of Life in the Universe: A Beginner’s Guide.

Sir Martin Rees is a cosmologist, Astronomer Royal of the British Empire, a member of the House of Lords and the winner of the Templeton Prize in 2011. He contributed an essay on man’s place in the universe to Aliens: The World’s Leading Scientists on the Search for Extraterrestrial Intelligence. In 2010 he said in […]

Jim Al-Khalili is a professor of physics at the University of Surrey in Guildford, England, and a frequent presenter of television programs about science for the BBC and Britain’s Channel 4. He is the editor of Aliens: The World’s Leading Scientists on the Search for Extraterrestrial Life.