Reacción a "Study finds three sigma probability of biological activity outside our solar system"

This is really interesting stuff and, while it does not yet represent a clear detection of Dimethyl Sulfide and Dimethyl Disulfide, it is a step in the right direction.

To get to a solid claim for the existence of life on this planet we’d need to have a solid detection, >5 sigma, a clear demonstration that this is a biomarker and not some other molecular species masquerading as a biomarker, and then a clear understanding that there is no non-biological way of producing the biomarker molecule in the amount seen. Planetary atmospheres are complicated and difficult to understand, especially with the limited information we get from a planet 124 light years away, so there will almost always be some provisos and uncertainties about interpretation, but more and better data will help, and the first step is getting a detection to >5 sigma so that we can be sure that something interesting is there.