Are we alone? It’s probably one of the, if not the most basic questions of human existence. People have been trying to answer ...
James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...
Before you submit an error, please consult our Video Help page. PBS Space Time is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, ...
A search of more than 1,300 galaxies for extraterrestrial signals has helped to constrain expectations as to how many communicating, technological civilizations may exist beyond Earth. Conducted with ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback