Chapter 2 of 10 · 3'04"
Someone in a disused ironstone quarry remembers hunting fossils as a boy. An ammonite becomes the way into a larger story: evolution as slow, careful work, then a line in the rock where most of that work vanishes. "Life had no option but to rebuild."
An Ammonite, Then Deep Time
❝ Monologue · 11 lines 75 Percent, Then Life Rebuilds
In a disused ironstone quarry at Tilton, in the middle of England, someone recalls searching rocks as a boy for fossils he calls buried treasure. This ammonite is called Tiltonicerus because the first was found near this quarry in Tilton. In life the animal lived in its chamber and spread its tentacles to catch prey, 180 million years ago. Then come slow change and a line in the rock.
The speaker begins in a disused ironstone quarry that has only just stopped working, recalling spare time spent searching rocks for buried treasure. The treasure is an ammonite. In life the animal lived in the chamber and spread out its tentacles to catch its prey, 180 million years ago. "By and large, it's a story of slow, steady change." Over billions of years, "nature has crafted miraculous forms, each more complex and accomplished than the last." "It's an achingly intricate labor." Then, every hundred million years or so, catastrophe: a mass extinction. "Great numbers of species disappear and are suddenly replaced by a few." "All that evolution undone." You can see it as a line in the rock layers. Below, a multitude of lifeforms; above, very few. It has happened five times in four billion years. The last, a meteorite, ended the dinosaurs and wiped out 75% of species. "Life had no option but to rebuild."
A1–C2 is the CEFR scale. Cards above the level you pick fade, and playback will not auto-pause on them.
“And in life the animal itself lived in the chamber here and spread out its tentacles to catch its prey.”
The fossil stops being a stone and becomes an animal reaching for food.
Neutral
“nature has crafted miraculous forms, each more complex and accomplished than the last.”
Deep time turns into a climb, each living shape outdoing the last.
literary
“It's an achingly intricate labor.”
The shortness makes that careful work feel almost too fine to look at.
literary
“Great numbers of species disappear and are suddenly replaced by a few.”
A crowd of species vanishes, and the sentence leaves only a few.
Neutral
“75% of all species were wiped out.”
One percentage makes the dying specific instead of vast and vague.
Neutral
“Life had no option but to rebuild.”
Rebuilding is spoken as the only move left, not as encouragement.
Formal
Great numbers of species disappear and are suddenly replaced by a few. All that evolution undone. You can see it. A line in the rock layers. A boundary that marks a profound, rapid, global change. Below the line are a multitude of lifeforms. Above, very few. A mass extinction has happened five times in life's four-billion-year history. The last time it happened was the event that brought the end of the age of the dinosaurs. A meteorite impact triggered a catastrophic change in the earth's conditions. 75% of all species were wiped out. Life had no option but to rebuild.
David Attenborough: A Life on Our Planet: your progress
Chapter 2 of 10 · about 23 min to go
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Up next · 03like clockworkThe scene: The Holocene Was Our EdenThe ammonite is the buried treasure from boyhood searches through the rocks. In life the animal lived in the chamber and spread its tentacles to catch prey, about 180 million years ago. The name Tiltonicerus exists because the first was found near this quarry in Tilton, in the middle of England.
A boundary marking profound, rapid, global change. Below the line are a multitude of lifeforms. Above, very few. The narration reads that line as a mass extinction: great numbers of species disappear and are suddenly replaced by a few, and all that evolution is undone.
A meteorite impact that triggered a catastrophic change in the earth's conditions. 75% of all species were wiped out. It was the most recent of five mass extinctions in life's four-billion-year history, and afterward life had no option but to rebuild.
No. By and large it is a story of slow, steady change. Over billions of years nature crafted miraculous forms, each more complex and accomplished than the last. That labor is achingly intricate. Catastrophe comes after those painstaking processes, about every hundred million years.
