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The Identification of Rock Formations Similar to “Spider Webs” by the Curiosity Rover Expands the Set of Evidence Analyzed About the Past Existence of Water on Mars, While Parallel Studies in Extreme Environments on Earth Help Scientists Understand Biological and Geological Limits Comparable to Those Investigated on the Red Planet
The Curiosity rover found clues related to Mars’ aquatic past by identifying rock formations described as “spider webs,” expanding scientific investigations about the planet while terrestrial research analyzes organisms that survive in similar extreme environments.
Mars, Curiosity Rover, and the Evidence Recorded in Rock Formations
The Curiosity rover located on Mars rock structures compared to “spider webs,” associated with clues about the past presence of water on the planet. The discovery reinforces the continuity of analyses conducted directly on the Martian surface.
The identification made by the Curiosity rover integrates the set of observations that seek to understand Mars’ environmental evolution. The analyzed formations are treated as relevant geological evidence within the investigation of Mars’ hydric history.
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Scientists have recorded 12 sunken vessels on the seabed around the port of Santos: seven have already been studied, with highlights including the Casador from 1828, the Questrel that appears at low tide, and the Professor Besnard, which capsized after a recent heavy rain.
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The time when astronauts traveled the farthest in space happened now: Artemis II took Orion to 406,771 kilometers from Earth, surpassing the Apollo 13 milestone by 6,600 kilometers.
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The rare emergence of triple cyclones in the Pacific can unleash extreme rainfall on islands, form twin storms, and even strengthen a stronger El Niño on the planet.
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The Moon holds billions of years of frozen water in dark craters that could provide fuel, oxygen, and drinking water for astronauts, and a new study finally explains how that ice got there.
The available material does not detail dimensions, exact location, or mineral composition of the structures observed on Mars. Nevertheless, the record broadens the scientific scope of ongoing robotic missions on the planet.
Extreme Environments on Earth Help Contextualize Studies Related to Mars, Curiosity Rover
While Mars remains under analysis by the Curiosity rover, research conducted on Earth investigates organisms capable of surviving in conditions considered extreme, including environments with high levels of ionizing radiation.
In the remaining structures of the Reactor Unit Four at Chernobyl, the black fungus Cladosporium sphaerospermum demonstrated growth in highly radioactive areas, nearly four decades after the nuclear accident that occurred in 1986.
Even with dangerous levels of radiation still present in certain areas of the exclusion zone, microbial communities continue to colonize the site. The adaptation of these organisms surprised researchers due to the diversity found.
Scientific Discoveries in Chernobyl Reveal Unexpected Diversity
In the late 1990s, microbiologist Nelli Zhdanova from the National Academy of Sciences of Ukraine led a survey within the shelter surrounding the destroyed reactor. The study identified 37 species of fungi living in the contaminated environment.
A large portion of these species exhibited dark coloration and a high concentration of melanin. Among them, Cladosporium sphaerospermum dominated the collected samples and recorded some of the highest levels of radioactive contamination.
The presence of melanized fungi drew attention due to the known ability of melanin to absorb radiation and reduce cellular damage. The observed diversity exceeded scientific expectations for an environment considered highly hostile.
Growth Under Radiation and Hypotheses Still Under Scientific Investigation
Ionizing radiation has enough energy to remove electrons from atoms, potentially breaking molecular bonds and damaging DNA. In humans, this exposure is associated with an increased risk of cancer and cellular destruction.
Experiments conducted by Ekaterina Dadachova and Arturo Casadevall at the Albert Einstein College of Medicine showed that exposure to radiation did not suppress Cladosporium sphaerospermum. The fungus exhibited accelerated growth during the tests.
The researchers observed changes in the behavior of melanin and proposed, in a paper published in 2008, the hypothesis of radiosynthesis. The concept suggests possible conversion of absorbed radiation into usable chemical energy.
Despite the proposal, radiosynthesis has yet to be proven. Scientists have not demonstrated carbon fixation driven by radiation or identified metabolic pathways capable of confirming the suggested energy process.
According to engineer Nils Averesch from Stanford University, the direct conversion of radiation into biological energy remains without conclusive experimental demonstration, keeping the phenomenon under continuous scientific investigation.
Additional studies indicate that the response to radiation varies among melanized species. The yeast Wangiella dermatitidis showed increased growth under radiation, while Cladosporium cladosporioides only increased melanin production.
Research continues to analyze how organisms interact with extreme environments, both in damaged structures on Earth and in scenarios investigated by space missions such as the one conducted on Mars by the Curiosity rover.
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