[ExI] Double-Earth (Was: kepler study says 8.8e9 earthlike planets)

[Anders Sandberg]

OK, now I have a better writeup:
http://www.aleph.se/andart/archives/2013/11/greetings_from_doubleearth.html

I am starting to think that really "wet" ocean worlds are likely not as 
hospitable to life as the "dry" ones. But land might still be optional.

-- 
Dr Anders Sandberg
Future of Humanity Institute
Oxford Martin School
Oxford University