I've often wished we could all have a brief moment of hurtling around the Earth, not to posture or preen, but to show the opposite — we are small, we are humble, and we need to fiercely care for the ...

In that moment, all of humanity was captured in a ghostly fragment of a pixel swimming through an unrelenting sea of darkness — a "Pale Blue Dot" lost in a void. Carl Sagan — the astronomer ...