The Kardashev Scale, first introduced by Russian astronomer Nikolai Kardashev, is a way of measuring how advanced a civilization is based on how much energy it can capture and use. Originally, the ...

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 ...

One of the most challenging aspects of astrobiology and the Search for Extraterrestrial Intelligence (SETI) is anticipating what life and extraterrestrial civilizations will look like. Invariably, we ...

In his 1964 paper, "Transmission of Information by Extraterrestrial Civilizations," famed astrophysicist and radio astronomer Nikolai Kardashev addressed the types of transmissions (and at what ...

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, ...

This video explores three possible futures for humanity, from the collapse of civilization to a technological renaissance and a future where humans spread beyond Earth. It examines the greatest ...

In context: Radio waves from distant galaxies are too faint to provide meaningful data for potential space observations. However, a sufficiently advanced alien civilization could harness energy in ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. One of the most fantastical claims SpaceX is making during the countdown toward a share ...