When will Earth face its final moments?

From the 2012 Mayan calendar to ongoing discussions about climate change, our curiosity about Earth's future survival remains. While scientists have provided insights into what may lie ahead, doomsday speculations still continue to thrive.

Come along as we dive into the central question behind all these musings: When will the Earth come to an end?

The Final Chapter of Planet Earth

Earth's eventual demise is likely to be caused by the sun within our solar system. This is a fact most of us are familiar with, but there's an approximate timeline. Scientists predict that Earth’s end will occur roughly one billion years from now, specifically in the year 1,000,002,021.

By that time, the sun's radiation will evaporate Earth's atmosphere, depleting the oxygen and resulting in the extinction of all life, leaving only a desolate rock. Or as the study puts it:

The Emergence of Simple and Complex Life

Water first emerged on Earth several billion years ago — specifically 4.3 billion years ago. However, it took another half-billion years for life to begin on the planet.

How Human Actions Could Influence the End of the World

While the Earth's demise and the depletion of atmospheric oxygen are eons away, human activities could significantly impact life on Earth long before then. In 1947, the Bulletin of Atomic Scientists introduced the Doomsday Clock.

The clock serves as "a symbol that alerts the public to how close we are to annihilating our world with the perilous technologies we've created. It’s a metaphor, a reminder of the risks we must confront if we wish to survive on this planet."

In the 1940s, the greatest threat came from nuclear weapons. By 2007, the Bulletin had recognized that climate change, which could result in a world submerged under oceans due to rising sea levels, was pushing us ever closer to midnight—the moment when our life-sustaining planet could reach its end.

In 2023, the organization released a statement titled: "A time of unprecedented danger: It is 90 seconds to midnight." Citing the Russian invasion of Ukraine and other factors, the Bulletin moved the clock hands forward to the closest they've ever been to global catastrophe.

Earth, 500 Years Into the Future

If you could travel back 500 years, you'd witness the Aztec empire nearing its decline, admire fresh works by Raphael, Titian, and Dürer, and feel the cooler temperatures that blanketed the Northern Hemisphere. This was the era of the Little Ice Age (1300–1850 C.E.) and the Age of Discovery, marked by vast European exploration.

If we were to peer 500 years into the future and catch a glimpse of Earth in the 26th century, we might find a planet as unrecognizable to us as the world of the 16th century would have been to its inhabitants. However, this depends largely on the interaction between human civilization and our natural surroundings — its history, present, and future.

The Impact of Climate Change

We have been reshaping Earth since at least the Agricultural Revolution during the Neolithic Age, and scientists still debate how many animal extinctions before that period should be attributed to our influence [source: Boissoneault]. We have guided the evolution of domesticated plants and animals, changed the landscape, and burned fossil fuels to sustain our way of life.

As a consequence, the planet’s climate has shifted — and continues to change. Some experts trace the onset of human-driven climate change to the Industrial Revolution in the 1800s, while others point to prehistoric slash-and-burn farming techniques.

Regardless, there is a broad scientific consensus that human actions are largely responsible for the warming trends observed over the past century.

NASA reports that carbon dioxide levels had reached 412 parts per million (ppm) by December 2019, up from 316 ppm in 1958, when scientists began monitoring CO2. Global temperatures have risen by 2.07 degrees Fahrenheit (1.15 degrees Celsius) since 1880, according to the National Oceanic and Atmospheric Administration. Meanwhile, Arctic ice is shrinking at a rate of 12.85 percent per decade, and sea levels are rising by 3.3 millimeters annually, as reported by NASA.

In essence, our planet is heating up, extreme weather events are becoming more frequent, and our natural environment is undergoing significant transformations.

These changes threaten the delicate balance of already over-exploited natural resources. The United Nations cautions that resulting droughts, floods, heat waves, and wildfires will only exacerbate land degradation and heighten the risk of severe food shortages. Such shortages have historically been the spark that ignites social unrest, mass migration, and conflict.

On one level, Earth in the 26th century will have had to confront the effects of climate change. According to some computer simulations, the melting of Antarctic ice may cause sea levels to rise by 1 foot (0.3 meters) by the end of this century and rise up to 26 feet (8 meters) by 2300.

The Role of Technology

Perhaps our descendants in the 26th century will look back on us and see that we acted in time. Maybe they’ll recognize that we made the necessary technological, cultural, and political changes to prevent mass extinctions, political instability, environmental devastation, and even the collapse of civilization.

Or perhaps they will look back and see a people who knowingly steered the world toward destruction.

Throughout this journey, our descendants will continue to advance their technological capabilities. While technology has been the driving force behind the risks of anthropogenic climate change and nuclear warfare, it also holds the potential to change course and improve our situation.

Theoretical physicist and futurist Michio Kaku envisions that in just 100 years, humanity will transition from a type 0 civilization to a type I civilization on the Kardashev Scale. Essentially, we will become a species capable of harnessing the full energy output of an entire planet.

With such power at their disposal, humans in the 26th century could master clean energy technologies such as fusion and solar power. Additionally, they would have the ability to control planetary energy to regulate global climate.

However, futurists remain divided on when, or even if, we will achieve such an advancement in our technological capabilities. As skeptic Michael Shermer noted in a 2008 Los Angeles Times article, political and economic barriers could easily prevent us from making this significant leap forward.

Technology has experienced exponential growth since the 1500s, and this rate of progress is expected to continue in the centuries ahead. Physicist Stephen Hawking proposed that by the year 2600, this growth would result in 10 new theoretical physics papers being published every 10 seconds. If Moore's Law holds true and both computer speed and complexity double every 18 months, some of these papers might be authored by highly intelligent machines.

However, he also foresaw that overcrowding and excessive energy use could render Earth uninhabitable by the year 2600.

A Visionary's Viewpoint

What other groundbreaking technologies could define the 26th century? Futurist and author Adrian Berry suggests that by then, the average human lifespan will extend to 140 years, and the digital preservation of human personalities will allow for a form of computerized immortality. People will farm the Earth's oceans, travel in starships, and live in colonies on both the Moon and Mars, while robots venture out into the far reaches of space.

These advancements may prove crucial, at least for a select few, if we fail to implement effective measures to address climate change.