Carl Sagan

Famed astronomer Carl Sagan once explained the 4th dimension by telling a story: the trip from "Flatland" to beyond!

Buzz Aldrin addressed claims that his walk on the moon was a hoax, spoke of why private flights ...

NASA plans to send a message out to the New Horizons probe before it leaves our solar system, ...

From Albert Einstein to Carl Sagan to Niels Bohr, many great physicists also had a way with words. ...

Model of the Big Bang theory. (NASA) British astronomer Sir Fred Hoyle was skeptical of the idea that our ...

Scientists face off on how oil formed in the Earth. A change in perspective could radically change the ...

Astrophysicist Neil deGrasse Tyson’s smooth voice and cool manner steered the Ship of Imagination through the known history ...