Nhà khoa học phủ định việc con người đang ở trong 'Thời đại của con người'

nhóm chuyên gia bỏ phiếu bác bỏ đề xuất, chính thức tuyên bố bắt đầu khoảng thời gian địa chất mới, khoảng thời gian xác định bởi thay đổi của loài người đối với hành tinh

The Triassic was the dawn of the dinosaurs (thời kỳ khủng long). The Paleogene saw the rise of mammals. The Pleistocene included the last ice ages (kỷ băng hà).

A committee of roughly two dozen scholars has, by a large majority, voted down a proposal to declare the start of the Anthropocene, a newly created epoch of geologic (địa chất) time, according to an internal announcement of the voting results seen by The New York Times.

By geologists’ current timeline of Earth’s 4.6-billion-year history, our world right now is in the Holocene, which began 11,700 years ago with the most recent retreat of the great glaciers. Amending the chronology to say we had moved on to the Anthropocene would represent an acknowledgment that recent, human-induced changes to geological conditions had been profound enough to bring the Holocene to a close.

By the definition that an earlier panel of experts spent nearly a decade and a half debating and crafting, the Anthropocene started in the mid-20th century, when nuclear bomb tests scattered radioactive fallout across our world (bụi phóng xạ rải rác khắp thế giới). To several members of the scientific committee that considered the panel’s proposal in recent weeks, this definition was too limited, too awkwardly recent, to be a fitting signpost of Homo sapiens’s reshaping of planet Earth.

Even so, it was unclear on Tuesday whether the results stood as a conclusive rejection or whether they might still be challenged or appealed. In an email to The Times, the committee’s chair, Jan A. Zalasiewicz, said there were “some procedural issues to consider” but declined to discuss them further. Dr. Zalasiewicz, a geologist at the University of Leicester, has expressed support for canonizing (phong thánh) the Anthropocene.

The Anthropocene proposal got its start in 2009, when a working group was convened to investigate whether recent planetary changes merited a place on the geologic timeline. After years of deliberation, the group, which came to include Dr. McCarthy, Dr. Ellis and some three dozen others, decided that they did. The group also decided that the best start date for the new period was around 1950.

Time will march on. Evidence of our civilization’s effects on Earth will continue accumulating (tích lũy) in the rocks. The task of interpreting what it all means, and how it fits into the grand sweep of history, might fall to the future inheritors of our world.

source: nytimes,

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