Habitats Not For Humanity

We place sharks in aquariums and elephants in zoos –“ to observe and conserve. But what if aliens have done the same to us? We´ll hear from Stephen King on a doomed result of a domed experiment –“ hatched by off-Earth beings, and why captivity may actually save some species on this planet. Plus, you´re entering the Habitable Zone: which is the best bet for life elsewhere in the Solar System –“ Europa, Enceladus or Mars?