Is humanity officially a geological force or just a passing event?

Space · Published 8 October 2026 Swipe more like this →

In short: For 11,500 years, the Holocene has provided a stable climate for civilization. But as human activity reshapes the planet's chemistry and biology, scientists are locked in a fierce debate: have we entered a new geological epoch, or are we simply witnessing a massive planetary event?

The term 'Anthropocene'—derived from the Greek for human and new—was popularized in 2000 by Paul J. Crutzen and Eugene F. Stoermer. It describes a period where Homo sapiens has become the most influential species, driving rapid changes in the atmosphere, oceans, and biodiversity. While the Earth is 4.5 billion years old, the scale of human impact has accelerated dramatically in the last 60 years, a phenomenon often called the 'Great Acceleration'.

The debate is not about whether humans are changing the Earth, but how to classify that change in geological time. Some scientists advocate for a formal 'Anthropocene epoch' to succeed the Holocene, marking a clear distinction between the stable Holocene and the era of human-driven boundary transgression. Others argue for an 'Anthropocene event,' suggesting that human impacts—from early agriculture to modern industrialization—are too gradual and widespread to be captured by a single starting point.

In 2024, the debate reached a turning point when geologists rejected the proposal to formalize the Anthropocene as a new epoch. The proposal had suggested a start date of 1952, linked to a spike in plutonium isotopes from nuclear testing. Nevertheless, some detractors contend that seventy years represents an insufficient duration for an epoch and that the plutonium peak fails to provide sufficient stratigraphic proof of wider Earth-system shifts.

This scientific tension mirrors the extreme human endeavors occurring even beyond our atmosphere. For instance, during Expedition 46, NASA's Scott Kelly and Roscosmos's Mikhail Kornienko spent a year aboard the International Space Station, gathering biomedical data essential for future missions to Mars.

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