Next, you'll be asked to connect with Twitter. Rest assured, we will never send a tweet from your account
without your permission.
We will send you an email with an invite soon.
With 3 earth+ mass planets in the habitable zone of this small star, 1+ may be habitable: 22 l.years away.
A record-breaking three #exoplanets in habitable zone of nearby star! Gliese 667c reexamined:
We are in a race to cross a dangerous zone, between where we are and where our grandchildren may be.
A TV network posted me getting all big-picture on our race to cross a danger zone to the future.
See what's Trending Now for @DavidBrin
Follow @DavidBrin on Twitter