Are we alone? Tiny spacecraft will head to Alpha Centauri to find out
There is no way that we are &quot;alone&quot; in a universe estimated to have practically infinite planets.<p>However, the distances between stars and the very short windows of time in which life may thrive (remember that we may have never known about the dinosaurs on <i>our very own planet</i> if we didn&#x27;t discover their bones, and we will never see them again) means that we may never meet any other life.