Ken Roy

"Traveling to the stars will be difficult, but not, perhaps, the most difficult part. What about when we get to another star? What then? Will the planets be immediately habitable? Not likely. Will those who undertook the journey be able to easily turn around and come home if they don't find 'Earth 2.0?' Almost certainly not. Therein the lies the challenge: Finding worlds that are potentially habitable and then taking the time, perhaps centuries, to...