ArticleScience advances2026
The origin of Cretaceous-Palaeogene impactor revealed by nickel isotopes.
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.
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.
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.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sixty-six million years ago, non-avian dinosaurs and other taxa went extinct during one of the largest mass extinctions in the history of life on Earth. The extinction was likely caused by an asteroid of unknown origin, responsible for the Chicxulub impact structure. Existing evidence identifies the impactor as an asteroid, similar to carbonaceous chondrites. However, carbonaceous chondrites are a diverse class of meteorites, leaving the exact nature of the impactor unclear. By measuring Ni isotopes in marine clays containing the impact ejecta, we constrain the impactor to one group of carbonaceous chondrites-CO chondrites-and some ungrouped chondrites. This study highlights the use of Ni isotopes in fingerprinting extraterrestrial materials on Earth. Given that CO chondrites are "dry" compared to the other carbonaceous chondrites and would have delivered much less volatiles, which are thought to be essential in causing the extinction, this work allows further studies of the mechanism behind the extinction.
Identifiers
What Socratic holds
Registered trials
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 Socratic graph.