A&A press release on Gliese 581 HZs
An A&A press release on the above Arvix paper,
complete with a diagram showing the various
models for habitability zones with Gliese 581.
http://www.aanda.org/content/view/275/42/lang,en/
Apparently at least one planet should be in the
HZ, according to these models, at least enough
for simple life forms.
