1.4 Earths
This is interesting:
The smallest planet around a normal star other than the Sun may be even smaller than first thought. A new analysis suggests the rocky body weighs just 1.4 Earths — less than half the original estimate. Observations over the next few months should test the prediction.
[…]
If their analysis is confirmed, it is an unclear whether the tiny planet could host any life. Because its host is a very dim red dwarf, the planet is likely to be frozen — even though it orbits at about the same distance as Venus from our Sun.
However, if the planet boasts a thick, insulating hydrogen atmosphere, it could sustain a habitable surface temperature that might be able to support some life of some kind.
The star is about 3000 light years away, which sadly makes it a little inaccessible; but we might be able to go there in the future.
(via Warren Ellis)