If that is what I think it is, I'm pretty sure that isn't considered strong evidence anymore. I don't know exactly why, I just remember there's reason to be skeptical of it and the reason seemed pretty valid.
Something to do with the amounts being minuscule, the fact that there are valid explanations outside of biology that could create such a chemical.
I'll have to look for the source, but they did follow-up observations with a different instrument and detected phosphine again. In spite of the wide-spread scepticism, the observation appears to be real. The source of the phosphine can be debated, of course.
Something to do with the amounts being minuscule, the fact that there are valid explanations outside of biology that could create such a chemical.