A civilization capable of interstellar travel may also be one that has moved beyond conquest, excess and ecological self-destruction — and it therefore may not want to talk to us.

“There is a silence in the night sky that has bothered me for as long as I can remember.” That observation, attributed to American physicist Richard Feynman, captures a tension many people feel when ...

Becoming an interstellar species sounds like the ultimate human achievement: leaving Earth behind, reaching new suns, and ...

The history of astronomical discovery shows that many of the most detectable phenomena, especially detection firsts, are not ...

“There is a silence in the night sky that has bothered me for as long as I can remember.” Richard Feynman’s reflection lingers because it feels personal. The stars look crowded. Common sense whispers ...