A new study published in the scientific journal Nature Geoscience suggests that Earth may lose conditions for life earlier than previously estimated. According to researchers Kazumi Ozaki and Christopher T. Reinhard, our planet could remain habitable for about 1 billion years, instead of the roughly 2 billion years previously thought.
Scientists explain that this difference is related to the natural evolution of the Sun, which over time becomes increasingly brighter and hotter. This gradual increase in solar energy will directly impact Earth's climate and atmospheric composition.
According to models, rising global temperatures will cause water evaporation from the oceans and significant chemical changes in the atmosphere. Over time, this will lead to a substantial decrease in oxygen, which is essential for life as we know it today. Currently, Earth's atmosphere contains about 20% oxygen, but this balance is not considered permanent.
The researchers emphasize that this process is very slow and does not pose a risk to humanity in the near future. However, it alters long-term estimates for how long Earth's biosphere can remain stable.
In the background, the text also relates to broader discussions on current global risks, such as international tensions, climate change, and the development of artificial intelligence, which operate on a much shorter timescale than these geological predictions.
Simultaneously, institutions like NASA are developing research programs to study exoplanets and conditions for life in the universe, to better understand the evolution and long-term fate of planets.