Harm Schoonhoven raises the concern that people in a Mars colony would never be able to return to Earth. This eventuality was covered by The Hitchhiker’s Guide to the Galaxy. In essence, its message ...

Living in today’s age of ambitious robotic exploration of Mars, with an eventual human mission to the red planet likely to happen one day, it is hard to imagine a time when Mars was a mysterious and ...

For years, popular culture has treated a human settlement on Mars as an almost inevitable next chapter, a matter of engineering and willpower rather than fundamental limits. Astrophysicist Neil ...

Camille Flammarion's work imagined what might exist beyond Earth in the universe. Three Lions/Hulton Archive via Getty Images Living in today’s age of ambitious robotic exploration of Mars, with an ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Living in today’s age of ambitious robotic ...