It is conceivable that humans could someday discover aliens. We scour the cosmos looking for their radio signals, and though we're not capable of int...
There's a constant push-pull between what is environmentally "best" and what is economically sensible. So, how to make the world better, and do it in a reasonable way? To start, you should gather information.
Jill Tarter has an ambitious plan: to come up with a system that would enable engineers, and anyone interested in life elsewhere, to participate in the quest for extra-terrestrial intelligence.