Alas, it’s not a study-abroad course – yet – but exoplanets may provide insight into how life formed on Earth.

Twenty-nine B-17s pressed on toward Berlin through weather, flak, and fighters, and for my grandfather the cost of one commander’s decision followed him into a German prison camp and for the rest of ...

For instance, what if we really are being visited by aliens from other worlds and they turn out to be aggressive, violent, ...