The DOI matches its Crossref record; 88 of the 88 references it cites were found in a registry or an index.
Reexamining Human Origins in Light of Ardipithecus ramidus
Abstract
Referential models based on extant African apes have dominated reconstructions of early human evolution since Darwin’s time. These models visualize fundamental human behaviors as intensifications of behaviors observed in living chimpanzees and/or gorillas (for instance, upright feeding, male dominance displays, tool use, culture, hunting, and warfare). Ardipithecus essentially falsifies such models, because extant apes are highly derived relative to our last common ancestors. Moreover, uniquely derived hominid characters, especially those of locomotion and canine reduction, appear to have emerged shortly after the hominid/chimpanzee divergence. Hence, Ardipithecus provides a new window through which to view our clade’s earliest evolution and its ecological context. Early hominids and extant apes are remarkably divergent in many cardinal characters. We can no longer rely on homologies with African apes for accounts of our origins and must turn instead to general evolutionary theory. A proposed adaptive suite for the emergence of Ardipithecus from the last common ancestor that we shared with chimpanzees accounts for these principal ape/human differences, as well as the marked demographic success and cognitive efflorescence of later Plio-Pleistocene hominids.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
The descent of man and selection in relation to sex
(1907) · The Journal of the Anthropological Society of Tokyo · doi:10.1537/ase1887.22.495 · Cited by 10,892
Sperm Competition and the Evolution of Animal Mating Systems
(1984) · Elsevier eBooks · doi:10.1016/b978-0-12-652570-0.x5001-5 · Cited by 1,819
The neurobiology of pair bonding.
Young, L. J., & Wang, Z. (2004) · Nature Neuroscience · doi:10.1038/nn1327 · Cited by 1,523
Lovejoy, C. O. (1981) · Science · doi:10.1126/science.211.4480.341 · Cited by 1,396
Self-citationAustralopithecus africanus The Man-Ape of South Africa
DART, R. A. (1925) · Nature · doi:10.1038/115195a0 · Cited by 1,141
Testis weight, body weight and breeding system in primates
Harcourt, A. H., Harvey, P. H., Larson, S. G., & Short, R. V. (1981) · Nature · doi:10.1038/293055a0 · Cited by 987
The descent of man, and selection in relation to sex
Darwin, C. (1871) · D. Appleton and company eBooks · doi:10.5962/bhl.title.24784 · Cited by 920
The locomotor anatomy of Australopithecus afarensis
Stern Jr., J. T., & Susman, R. L. (1983) · American Journal of Physical Anthropology · doi:10.1002/ajpa.1330600302 · Cited by 860
Ardipithecus ramidus and the Paleobiology of Early Hominids
White, T. D., Asfaw, B., Beyene, Y., Haile-Selassie, Y., Lovejoy, C. O., Suwa, G., & WoldeGabriel, G. (2009) · Science · doi:10.1126/science.1175802 · Cited by 676
Self-citationWashburn, S. L. (1960) · Scientific American · doi:10.1038/scientificamerican0960-62 · Cited by 596
Cited by
Loneliness matters: a theoretical and empirical review of consequences and mechanisms
Hawkley, L. C., & Cacioppo, J. T. (2010) · Annals of Behavioral Medicine · doi:10.1007/s12160-010-9210-8 · Cited by 4,782
“ensure that humans survived, reproduced, and cared for offspring sufficiently long that they, too, could reproduce [96–98].”
Ardipithecus ramidus and the Paleobiology of Early Hominids
White, T. D., Asfaw, B., Beyene, Y., Haile-Selassie, Y., Lovejoy, C. O., Suwa, G., & WoldeGabriel, G. (2009) · Science · doi:10.1126/science.1175802 · Cited by 676
Self-citationEvolutionary mechanisms for loneliness
Cacioppo, J. T., Cacioppo, S., & Boomsma, D. I. (2014) · Cognition and Emotion · doi:10.1080/02699931.2013.837379 · Cited by 576
“…certain adaptations exhibited by this early hominin species (i.e., diminution of male canine size, upright walking, and absence of ovulatory signalling) reduced intra-sexual conflict among males and fostered pair-bonding and greater male parental investment (de Waal & Pollick, 2005; Lovejoy, 2009).”
Human-specific loss of regulatory DNA and the evolution of human-specific traits
McLean, C. Y., Reno, P. L., Pollen, A. A., Bassan, A. I., Capellini, T. D., Guenther, C., Indjeian, V. B., Lim, X., Menke, D. B., Schaar, B. T., et al. (2011) · Nature · doi:10.1038/nature09774 · Cited by 535
Gene-culture coevolution in the age of genomics
Richerson, P. J., Boyd, R., & Henrich, J. (2010) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0914631107 · Cited by 393
Metadata
- Authors
- Lovejoy, C. O.
- Venue
- Science
- Published
- 2009-10-02
- Volume
- 326
- Issue
- 5949
- Pages
- 74
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2145521965
- Cited by
- 344
- References
- 88
- FWCI
- 143.05
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Reexamining Human Origins in Light of Ardipithecus ramidus. https://app.cochat.ai/papers/10.1126/science.1175834
- The paper
- Lovejoy, C. O. (2009). Reexamining Human Origins in Light of Ardipithecus ramidus. Science. https://doi.org/10.1126/science.1175834
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.