Missing microbial poop in Venus' clouds suggests the planet has no life


"Science begets knowledge, opinion ignorance.
Venus' atmosphere bears no signs of microbes eating or pooping, suggesting that the odd chemical composition of the planet's clouds cannot be explained by extraterrestrial life.

But aren't the clouds rushing around at a zillion (600?) kph and dispersing the food/excrement? Would they be sulphated or sulphonated? Lower cloud levels are very hot.

Cat :)
No life on Venus should not be a surprise. Astrobiology is struggling to show life is somewhere other than earth. Now we have this interesting report on the cradle of life. Ancient Pilbara rocks provide a glimpse into cradle of life on Earth,

"In the hot springs they analyzed, Martin's team found the chemicals necessary for life to begin from non-life—a phenomenon known as "abiogenesis." The findings are evidence against the popular theory that life sprung from deep sea hydrothermal vents. In the enduring theory, it's thought that the heat and mineral-rich water in the hydrothermal vents attracted a huge diversity of microbial life, creating the ideal conditions where live organisms could form. But according to Martin, the deep sea vent hypothesis has an Achille's heel: water."

"Water is vital for life as we know it. Astrobiologists consider planets with water to be the most promising candidates for extraterrestrial life. But life's crucial building blocks like DNA and proteins are formed through condensation reactions—which needs both the absence and presence of water. "Over the past few years, the [astrobiology] community has shifted away from deep sea vents," says Martin. "There are still some high-profile people who have worked on this problem for a long time who support deep sea hydrothermal processes. But the more people investigate it, the less likely it seems to be the case." According to Martin, while deep sea vents can develop some geochemical complexity, they face overwhelming problems. "It's very difficult to make complex organic molecules in permanently wet environments," he says. "It's much easier to concentrate elements with wet and dry cycles on the Earth's surface."

Looks like water is a real problem to explain the origin of life.
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