It is a source of wonder and awe to me, who grew up learning that the planets of other star systems were so far away that we would never learn anything about them until we sent probes, to be able to talk in a more than purely speculative fashion about the planetary system of another star. Thank you, Marcy and Butler, and thank you to the whole ( Read more... )

Earth, as our homeworld, is already habitable. The problem is that our polluting activities are “de-terraforming” her, rendering her less habitable and destroying the biological riches that are our world’s evolutionary heritage. Our immediate task in managing the Earth’s future is to slow, stop, and eventually reverse this process of ( Read more... )

According to ( Read more... )