Scientist and Writer, Columbia University, New York
Caleb Scharf is director of astrobiology at Columbia University in New York. He is the author of Extrasolar Planets and Astrobiology (2009), which won the Chambliss Astronomical Writing Award. His latest book is The Zoomable Universe: An Epic Tour Through Cosmic Scale, from Almost Everything to Nearly Nothing (2017).
What if ET is an AI?
After centuries searching for extraterrestrial life, we might find that first contact is not with organic creatures at all
Where do minds belong?
Intelligence could have been moving back and forth between biological beings and machine receptacles for aeons
Are we alone?
The Universe seems to be bursting with planets, and this is profoundly important — but not in the way we might expect