It looks like the results are in question, which is expected, but also the much less interesting explanation compared to microbial life. "In the second paper,

It looks like the results are in question, which is expected, but also the much less interesting explanation compared to microbial life. "In the second paper, the authors use a system that models what absorption spectra will look like given different atmospheric concentrations of sulfur dioxide and phosphine. They also find that having sulfur dioxide in the mesosphere produces a signal that's indistinguishable from the one the original research assigns to phosphine. And the conditions in the mesosphere would also suppress the other signals of sulfur dioxide that the first report had used to argue it wasn't present." "Phosphine in the mesosphere could produce a similar signal, but the researchers calculate that the different environment there means that a typical phosphine molecule would have a half-life of one second. To produce enough phosphine to keep the mesosphere supplied, it would have to be made at a rate higher than the production of oxygen by all the photosynthetic organisms on Earth. Given that's just a tiny bit unlikely, the authors suggest we're just looking at sulfur dioxide."