Evidence map›Paper›PMID 32555457›Full record

ArticleNature2020

The first dinosaur egg was soft.

Mark A Norell, Jasmina Wiemann, Matteo Fabbri, Congyu Yu, Claudia A Marsicano, Anita Moore-Nall, David J Varricchio, Diego Pol, Darla K Zelenitsky

Abstract read
PubMed Publisher
In one paragraph

Article in Nature, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
21.4field-weighted citation impact, top 1% of its field
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

24 citing papers in PubMed, 77 citations in OpenAlex.

  1. Hatchlings ofBiology · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Insights into the early evolution of modern avian physiology from fossilized soft tissues from the Mesozoic.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Rethinking the egg.National science review · 2024
    Article
  12. PeerJ · 2024
    Article
  13. Chthonic severance: dinosaur eggs of the Mesozoic, the significance of partially buried eggs and contact incubation precursors.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Review
  14. Article
  15. Evidence for heterothermic endothermy and reptile-like eggshell mineralization inProceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 6 institutions in 3 countries.

Mark A NorellDivision of Vertebrate Paleontology, American Museum of Natural History, New York, NY, USA. norell@amnh.org.
Jasmina WiemannDepartment of Geology & Geophysics, Yale University, New Haven, CT, USA. jasmina.wiemann@yale.edu.ORCID http://orcid.org/0000-0003-3581-1711
Matteo FabbriDepartment of Geology & Geophysics, Yale University, New Haven, CT, USA. matteo.fabbri@yale.edu.ORCID http://orcid.org/0000-0002-1257-1594
Congyu YuDivision of Vertebrate Paleontology, American Museum of Natural History, New York, NY, USA.ORCID http://orcid.org/0000-0002-8686-3362
Claudia A MarsicanoDepartamento de Ciencias Geológicas, Universidad de Buenos Aires, Buenos Aires, Argentina.ORCID http://orcid.org/0000-0002-0121-6730
Anita Moore-NallDepartment of Earth Sciences, Montana State University, Bozeman, MT, USA.
David J VarricchioDepartment of Earth Sciences, Montana State University, Bozeman, MT, USA.ORCID http://orcid.org/0000-0002-0594-0929
Diego PolCONICET, Museo Paleontológico Egidio Feruglio, Trelew, Argentina.ORCID http://orcid.org/0000-0002-9690-7517
Darla K ZelenitskyDepartment of Geoscience, University of Calgary, Calgary, Alberta, Canada.
American Museum of Natural History · USMontana State University · USYale University · USConsejo Nacional de Investigaciones Científicas y Técnicas · ARUniversidad de Buenos Aires · ARUniversity of Calgary · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Calcified eggshells protect developing embryos against environmental stress and contribute to reproductive success

Indexed as

DinosaursFossilsHardnessAnimalsBiological EvolutionBiomineralizationCalcium CarbonateEgg ShellCalcium Carbonate

Identifiers

PMID32555457
OpenAlexW3036946317

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.