Carl Sagan

Ivy Mike

What you need to know about modern nuclear war

Science Friday host Ira Flatow spoke to three nuclear experts to learn more about what modern nuclear war might look like.

What you need to know about modern nuclear war
An artist's rendering of a habitable moon orbiting a gas giant planet.

Life beyond Earth? The best bet may be on moons, not planets

Life beyond Earth? The best bet may be on moons, not planets

NASA shares a family portrait of the inner solar system, starring Saturn

NASA shares a family portrait of the inner solar system, starring Saturn

John Hodgman interviews Neil deGrasse Tyson

John Hodgman interviews Neil deGrasse Tyson

Debate over evolution: Destiny or happenstance?

Debate over evolution: Destiny or happenstance?

Discovery's Final Frontier?

After today's landing, the space shuttle Discovery will retire on planet earth. To learn what may be in store for the future of our space aspirations we speak to Louis Friedman and Neil deGrasse Tyson.

Discovery's Final Frontier?

The legacy of Carl Sagan

The late Carl Sagan's legacy is continued by way of his son's new book about cutting-edge technologies and where science fiction has become reality.

The legacy of Carl Sagan