| Title |
Gender-Specific Reproductive Tissue in Ratites and Tyrannosaurus rex
|
|---|---|
| Published in |
Science, June 2005
|
| DOI | 10.1126/science.1112158 |
| Pubmed ID | |
| Authors |
Mary H. Schweitzer, Jennifer L. Wittmeyer, John R. Horner |
| Abstract |
Unambiguous indicators of gender in dinosaurs are usually lost during fossilization, along with other aspects of soft tissue anatomy. We report the presence of endosteally derived bone tissues lining the interior marrow cavities of portions of Tyrannosaurus rex (Museum of the Rockies specimen number 1125) hindlimb elements, and we hypothesize that these tissues are homologous to specialized avian tissues known as medullary bone. Because medullary bone is unique to female birds, its discovery in extinct dinosaurs solidifies the link between dinosaurs and birds, suggests similar reproductive strategies, and provides an objective means of gender differentiation in dinosaurs. |
X Demographics
The data shown below were collected from the profiles of 11 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 3 | 27% |
| Canada | 1 | 9% |
| Australia | 1 | 9% |
| Unknown | 6 | 55% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 9 | 82% |
| Scientists | 2 | 18% |
Mendeley readers
The data shown below were compiled from readership statistics for 209 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 4 | 2% |
| Canada | 3 | 1% |
| United Kingdom | 3 | 1% |
| Argentina | 2 | <1% |
| South Africa | 1 | <1% |
| Brazil | 1 | <1% |
| Portugal | 1 | <1% |
| Germany | 1 | <1% |
| Chile | 1 | <1% |
| Other | 2 | <1% |
| Unknown | 190 | 91% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 48 | 23% |
| Student > Ph. D. Student | 36 | 17% |
| Student > Master | 23 | 11% |
| Student > Bachelor | 18 | 9% |
| Professor | 12 | 6% |
| Other | 49 | 23% |
| Unknown | 23 | 11% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 79 | 38% |
| Earth and Planetary Sciences | 73 | 35% |
| Environmental Science | 9 | 4% |
| Biochemistry, Genetics and Molecular Biology | 6 | 3% |
| Physics and Astronomy | 3 | 1% |
| Other | 10 | 5% |
| Unknown | 29 | 14% |
Attention Score in Context
This research output has an Altmetric Attention Score of 196. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 12 February 2024.
All research outputs
#201,542
of 25,380,459 outputs
Outputs from Science
#5,647
of 80,849 outputs
Outputs of similar age
#194
of 67,871 outputs
Outputs of similar age from Science
#10
of 361 outputs
Altmetric has tracked 25,380,459 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 80,849 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 65.4. This one has done particularly well, scoring higher than 93% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 67,871 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 361 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 97% of its contemporaries.