It was certainly a thrilling and intriguing announcement when a separate team came forward last September with the tantalising observations of PH3 at the second planet from the Sun.
Some astronomers initially questioned the correctness of the PH3 observations, which were made with two different telescope systems. But this latest challenge comes from a very different quarter - from experts in biochemistry. Dr Hallsworth is a microbiologist whose focus is the reaction of living organisms to stress.
"A colleague, Paul Rimmer, has a paper just out showing that some cloud droplets could have a very high water content," she told BBC News. The new research indicates compatible temperatures and water availability should be found at a depth where the pressure is about five times that at sea-level on Earth. Of course, this says nothing about the other requirements for life, such as a supply of nutrients.
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