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Tiny Salt Crevices Could Be Martian Microbe Havens
Confirmed
In Short: Scientists propose that halite salt crystals on Mars could create miniature greenhouses for potential microbial life, offering both moisture and shelter.
Scientists have proposed a novel hypothesis that halite salt crystals on Mars could serve as miniature greenhouses for potential microbial life, providing both moisture and shelter. According to the authors' models, halite crystals can contract by up to 1.6% between 150 K and 300 K, potentially opening microscopic fractures and crevices. This phenomenon could allow microbes to survive the harsh Martian environment by hiding in these tiny spaces.
During the Martian night, the planet's air cools and its relative humidity climbs, allowing salts scattered across the surface to absorb some of this vapor through a process known as deliquescence. On the flip side, during the Martian day, temperatures warm up to a much more reasonable 0℃, or even higher at some points near the equator. This temperature fluctuation could create conditions that are conducive to microbial survival.
Lead author Anna Bognar and her team at ELTE Eötvös Loránd University and the Konkoly Observatory describe how life could access both moisture and warmth by hiding away in salt crystals. The researchers suggest that this mechanism could explain how microbes might have found a way to survive the Red Planet's desiccation by hiding in salt crevices.
Previous studies have shown that salts can absorb moisture, but the new paper highlights the potential for these crystals to create micro-environments that could support microbial life. The authors propose that during the Martian night, the deliquescence process allows salts to absorb moisture, and during the day, the warming temperatures could provide the necessary warmth for potential microbes to thrive.
The concept of halite salt crystals acting as miniature greenhouses for microbial life on Mars is intriguing, but further research is needed to confirm the presence of such conditions and the potential for microbial survival. The hypothesis opens up new avenues for understanding the potential for life on Mars and could inform future missions aimed at searching for signs of past or present microbial life.
What's confirmed
- Scientists have proposed a novel hypothesis that halite salt crystals on Mars could serve as miniature greenhouses for potential microbial life, providing both moisture and shelter. According to the authors' models, halite crystals can contract by up to 1.6% between 150 K and 300 K, potentially opening microscopic fractures and crevices. This phenomenon could allow microbes to survive the harsh Martian environment by hiding in these tiny spaces.
- During the Martian night, the planet's air cools and its relative humidity climbs, allowing salts scattered across the surface to absorb some of this vapor through a process known as deliquescence. On the flip side, during the Martian day, temperatures warm up to a much more reasonable 0℃, or even higher at some points near the equator. This temperature fluctuation could create conditions that are conducive to microbial survival.
- Lead author Anna Bognar and her team at ELTE Eötvös Loránd University and the Konkoly Observatory describe how life could access both moisture and warmth by hiding away in salt crystals. The researchers suggest that this mechanism could explain how microbes might have found a way to survive the Red Planet's desiccation by hiding in salt crevices.
- Previous studies have shown that salts can absorb moisture, but the new paper highlights the potential for these crystals to create micro-environments that could support microbial life. The authors propose that during the Martian night, the deliquescence process allows salts to absorb moisture, and during the day, the warming temperatures could provide the necessary warmth for potential microbes to thrive.
- The concept of halite salt crystals acting as miniature greenhouses for microbial life on Mars is intriguing, but further research is needed to confirm the presence of such conditions and the potential for microbial survival. The hypothesis opens up new avenues for understanding the potential for life on Mars and could inform future missions aimed at searching for signs of past or present microbial life.
What's still developing
- Tests performed after his death revealed DNA from two species of Babesia, tiny parasites that infect red blood cells, and Bartonella henselae, the bacterium that causes cat-scratch disease.
- A review cited by the researchers describes two possible routes: microbes acting directly on the nervous system, and the body's immune response affecting brain function.
- Researchers confirmed DNA from one or both groups of microbes in five individuals.
- This year, the prizes honor research on designing the perfect splash-free urinal; using mosquito proboscises to “necroprint” tiny nozzles; studying composition rates of buried cotton underwear; and the aerodynamics of a healthy nose-blow, among other highlights.
- Established in 1991, the Ig Nobels are a good-natured parody of the Nobel Prizes; they honor “achievements that first make people laugh and then make them think.” The unapologetically campy awards ceremony features miniature operas, scientific demos, and “24/7 lectures,” whereby experts must explain their work twice: once in 24 seconds and the second in just seven words.