Evidence map›Paper›PMID 41961931›Full record

ArticleScience advances2026

Earth system instability explains redox paradox during late Cambrian SPICE event.

Kai Sheng, Zi-Heng Li, Jian-Lin Zhou, Yi-Bo Lin, Guo-Lin Xiong, Guang-Ying Ren, Zhong-Qiang Chen, Timothy M Lenton, Shu-Zhong Shen, Feifei Zhang

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Kai ShengState Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China.ORCID 0009-0007-7208-1451
Zi-Heng LiState Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences, Wuhan, China.ORCID 0000-0003-4145-612X
Jian-Lin ZhouState Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China.
Yi-Bo LinState Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China.ORCID 0000-0003-4945-0750
Guo-Lin XiongState Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China.
Guang-Ying RenInstitute of Geology and Paleontology, Linyi University, Linyi, China.ORCID 0009-0009-1030-0342
Zhong-Qiang ChenState Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences, Wuhan, China.ORCID 0000-0001-5341-6913
Timothy M LentonGlobal Systems Institute, University of Exeter, Exeter, UK.ORCID 0000-0002-6725-7498
Shu-Zhong ShenState Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China.ORCID 0000-0001-8380-0692
Feifei ZhangState Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China.ORCID 0000-0003-3277-445X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The late Neoproterozoic-early Paleozoic (~600 to 520 million years ago) witnessed a fundamental shift under atmosphere-ocean redox conditions, where pulsed ocean oxygenation events (OOEs) were replaced by episodic ocean anoxic events (OAEs). The Cambrian Steptoean positive carbon isotope excursion (SPICE) event (494.5 to 492.5 million years ago) represents a major early Paleozoic OAE, yet its drivers and underlying dynamics remain controversial. Here, we present carbonate uranium isotope (δ

Identifiers

PMID41961931
PMCPMC13068071

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.