Scientists discover the “Goldilocks” secret behind life on Earth

Earth's habitability may hinge on a cosmic chemistry lottery where oxygen levels during planetary formation had to fall within an extremely narrow "Goldilocks zone" to retain life-essential phosphorus and nitrogen near the surface. | Contesto: cronaca

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• Scientists discover the “Goldilocks” secret behind life on Earth

Contesto

Earth may have won a cosmic chemistry lottery, according to new research. The planet's ability to support life appears to depend on a precise chemical balance established during its earliest formation. Scientists discovered that oxygen availability had to exist within an extremely narrow range for two critical elements—phosphorus and nitrogen—to remain accessible to emerging life forms. This "Goldilocks zone" represents a delicate atmospheric and geological equilibrium. If oxygen levels were too high or too low during Earth's formative period, these essential ingredients would have been either lost to space or trapped deep within the planet's interior. Both scenarios would have rendered them unavailable for biological processes. The findings suggest that the search for extraterrestrial life must consider more than just the presence of water. Planetary chemistry during formation may be equally crucial, potentially narrowing the conditions under which life can emerge elsewhere in the universe.

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Categoria: cronaca