This is the first installment of a five-part WorldPost series on the world beyond 2050. The series is adapted from the Nierenberg Prize Lecture by Lord Martin Rees in La Jolla, Calif. Part two will be published next week.
For nearly 50 years, the image of the Earth, as seen by Apollo astronauts circling the moon, has been iconic among environmentalists.
Suppose there were some aliens out there and they’d been watching our planet for its entire 4.5 billion year history. What would they have seen? Over nearly all that immense time, Earth’s appearance would have altered very gradually. read more >>>
Source : HuffingtonPost.Com