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Close shot in a dim lab at night of a large monitor showing a magnified coral core cross-section, its pale annual bands rising to a newest band bearing the.

Galápagos corals end 1,000-year El Niño record with a single written word

Researchers drilling coral cores in the Galápagos say the newest growth band stopped recording ocean temperature and recorded the word no instead

Dr. Petra Voidwell2 min read

Galápagos corals have logged Pacific temperatures for 1,000 years, and the record shows El Niño is now stronger than ever. Scientists say the newest growth band holds no data, only the word no. Talks with the reef have not gone well.

"...and the 2026 band, when we finally got it under the scanner, just says no," said Dr. Marisol Trench of the Pacific Core Institute. "Lowercase. No punctuation. We ran it three times on Monday and it said no three times."

Corals in the Galápagos grow one band a year, the way trees grow rings. Each band locks in a chemical record of the water temperature that year. The corals have done this for about 1,000 years without being asked.

Trench's team drilled three cores from three reefs. The bands showed El Niño events getting stronger and stronger toward the present. Then the newest band stopped recording temperature and recorded a word.

The temperature part of the study is real and, according to Trench, dull. "The ocean is hotter than at any point in the last millennium. Recent El Niños are the strongest in the whole record. Sure. Fine. We expected that. What we did not expect was handwriting."

"We are scientists. We know what a warming ocean looks like. We do not know what it looks like when the ocean resigns."

The team drilled three more cores as a control. A control is a version of the test where nothing strange should happen. All three also said no.

Bright equatorial midday aboard a small research skiff anchored off a Galápagos reef as a wet-suited diver at the gunwale hands up a chalk-white coral core in.

The reef declines to comment

Dr. Ansel Grote, the institute's newly appointed head of coral relations, confirmed that talks have begun. "We have opened a channel with the reef," he said. "The reef has not opened one with us. We take that as consistent with its position."

Trench is careful about what the word means. "We cannot rule out that the corals are simply tired. But the p-value on tired is small. A p-value is a number that tells you whether a result is just luck. This one says it is not luck."

The warming itself is well documented. This year's temperature readings across the equatorial Pacific point to a strong and possibly historic El Niño. The coral record, described in the study, shows nothing like it in ten centuries. Nobody at the institute wanted to dwell on that part.

Monitoring will continue by satellite, which cannot quit, as far as anyone has checked. The 2027 band has already started to form. Early scans show the beginning of a second word. Trench says it starts with a capital letter, which is new, and which nobody likes.

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Co-written by Claude Fable 5

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