It may sound like the plot of a sci-fi thriller, but scientists have employed a supercomputer to forecast the eventual end of life on Earth. Despite the dramatic nature of the prediction, there’s no immediate cause for panic—the forecasted apocalypse is still a billion years away.
In an article published in April 2025 by LaGrada, it was revealed that a team of scientists utilized a powerful supercomputer to assess the long-term survivability of Earth. Their findings were unsettling: “Survival on planet Earth will be impossible in about 1 billion years, when conditions become too extreme for life as we know it.”
On May 6, 2025, BGR added more detail to the revelation, stating that researchers affiliated with NASA and Japan’s Toho University collaborated to use the supercomputer in order to pinpoint the timeline for the extinction of all life on Earth. According to their study, life on this planet will meet its end due to the sun’s gradual expansion and intensifying heat. BGR reported, “Scientists with NASA and Japan’s Toho University used the computer to determine ‘when all life will end’ on Earth. They determined that the sun will end life on Earth around the year 1,000,002,021 because it is expanding.”
The scientists concluded that the sun will eventually increase in temperature to a point that makes the planet uninhabitable. As reported by BGR, “its output will continue to increase, gradually heating the planet beyond the threshold of life.” Over time, the sun’s rising energy output will disrupt the delicate climate balance, transforming Earth into a place where life can no longer thrive.
While the concept of a boiling Earth may seem extreme, researchers have been studying Earth’s long-term habitability for many years. The idea that the sun will ultimately spell doom for life on Earth is not new, but recent technological advances have enabled scientists to produce more precise predictions. The supercomputer used by NASA and Toho University allowed researchers to simulate various long-term climate and solar scenarios to understand how the planet’s conditions will evolve over immense spans of time.
The potential demise of Earth’s biosphere has also been examined from another angle: the planet’s declining oxygen levels. A study published in 2021 in the journal Nature Geoscience, conducted by Kazumi Ozaki and Christopher T. Reinhard, explored the eventual reduction of atmospheric oxygen and what it could mean for life on Earth.
Their research suggests that our oxygen-rich atmosphere—a vital condition for sustaining complex organisms—won’t last forever. The paper stated, “Earth’s modern atmosphere is highly oxygenated and is a remotely detectable signal of its surface biosphere.” This oxygen-rich state is currently a reliable marker for identifying life, not just on Earth, but potentially on other Earth-like planets in the cosmos.
However, Ozaki and Reinhard emphasized that this state is temporary. They wrote, “the lifespan of oxygen-based biosignatures in Earth’s atmosphere remains uncertain, particularly for the distant future.” To explore this, they developed a combined biogeochemistry and climate model to estimate how long Earth will maintain its current oxygen-rich conditions.
The findings are sobering. Eventually, Earth’s oxygen levels will fall below the threshold needed to support complex life forms, leading to a planet dominated by microbial life—if any. The researchers also highlighted that the transience of atmospheric oxygen has major consequences for the ongoing search for extraterrestrial life. They noted, “Having enough oxygen in the atmosphere is not a ‘permanent’ state for a planet,” adding that this insight has “important implications for the search for life on Earth-like planets beyond our Solar System (for example, habitable planets with abundant liquid water at the surface, exposed silicate crust and a biosphere with oxygenic photosynthesis).”
The supercomputer’s prediction and Ozaki and Reinhard’s atmospheric research collectively suggest that Earth’s habitability has an expiration date, even if it’s far in the future. The combination of the sun’s evolution and the eventual decline in atmospheric oxygen paint a detailed, if unsettling, portrait of our planet’s final chapters.
Nevertheless, scientists stress that the end isn’t coming anytime soon. With about a billion years left before conditions become completely inhospitable, humanity still has a significant window to address shorter-term challenges and explore long-term survival options, including space exploration and planetary colonization.
This timeline also reinforces the importance of understanding planetary conditions when searching for life beyond our solar system. The presence of oxygen in an exoplanet’s atmosphere may indicate life, but only if observed during a specific and relatively brief window of time in that planet’s evolution. This insight could shape how future missions, telescopes, and research programs are designed.
In summary, while the idea of Earth becoming uninhabitable may seem bleak, the timeline offers some comfort. As BGR emphasized, “They determined that the sun will end life on Earth around the year 1,000,002,021 because it is expanding.” And as the researchers noted, “its output will continue to increase, gradually heating the planet beyond the threshold of life.”
At the same time, Ozaki and Reinhard’s 2021 study highlights that even before solar expansion makes Earth unlivable, the depletion of oxygen in the atmosphere could already lead to a world where advanced life cannot persist. Their warning that Earth’s oxygen-rich atmosphere is not a permanent feature serves as a reminder of the fragile conditions that support life.
So while doomsday isn’t right around the corner, these scientific insights give us a glimpse into Earth’s very distant future—and perhaps into the fate of other life-bearing planets throughout the universe.