Nasa recently remembered a famous image of Earth as a mere pale blue dot in the distance. The famous photograph was taken in ...

"Pale Blue Dot" – one of the last photos taken by Voyager 1 – is still the most distant image of the Earth. Astronomer Carl ...

In his book, Sagan wrote: "The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet.