Editing Tyrannosaurus (section)

===Footprints===
[[File:Philmont T-Rex 2022.jpg|left|thumb|Probable footprint from [[New Mexico]]]]
Two isolated fossilized [[footprint]]s have been tentatively assigned to ''T. rex''. The first was discovered at [[Philmont Scout Ranch]], New Mexico, in 1983 by American geologist Charles Pillmore. Originally thought to belong to a [[hadrosaurid]], examination of the footprint revealed a large 'heel' unknown in [[ornithopod]] dinosaur tracks, and traces of what may have been a [[hallux]], the dewclaw-like fourth digit of the tyrannosaur foot. The footprint was published as the [[ichnogenus]] ''[[Tyrannosauripus pillmorei]]'' in 1994, by [[Martin Lockley]] and Adrian Hunt. Lockley and Hunt suggested that it was very likely the track was made by a ''T. rex'', which would make it the first known footprint from this species. The track was made in what was once a vegetated wetland mudflat. It measures {{convert|83|cm|in|sp=us}} long by {{convert|71|cm|in|sp=us}} wide.<ref name="lockley&hunt1994">{{Cite journal |last1=Lockley |first1=M. G. |last2=Hunt |first2=A. P. |year=1994 |title=A track of the giant theropod dinosaur ''Tyrannosaurus'' from close to the Cretaceous/Tertiary boundary, northern New Mexico |journal=Ichnos |volume=3 |issue=3 |pages=213–218  |doi=10.1080/10420949409386390|bibcode=1994Ichno...3..213L }}</ref>

A second footprint that may have been made by a ''Tyrannosaurus'' was first reported in 2007 by British paleontologist Phil Manning, from the [[Hell Creek Formation]] of Montana. This second track measures {{convert|72|cm|in|sp=us}} long, shorter than the track described by Lockley and Hunt. Whether or not the track was made by ''Tyrannosaurus'' is unclear, though ''Tyrannosaurus'' is the only large theropod known to have existed in the Hell Creek Formation.<ref name="rextrack2007">{{Cite web |url=http://www.nhm.ac.uk/about-us/news/2007/october/news_12515.html |title=A Probable Tyrannosaurid Track From the Hell Creek Formation (Upper Cretaceous), Montana, United States |year=2007 |website=National Museum of History News  |access-date=December 18, 2007 |archive-url=https://web.archive.org/web/20071214014855/http://www.nhm.ac.uk/about-us/news/2007/october/news_12515.html |archive-date=December 14, 2007 }}</ref><ref name="manningetal2008">{{Cite journal |last1=Manning |first1=P. L. |last2=Ott |first2=C. |last3=Falkingham |first3=P. L. |s2cid=129985735 |year=2009 |title=The first tyrannosaurid track from the Hell Creek Formation (Late Cretaceous), Montana, U.S.A |journal=PALAIOS |volume=23 |issue=10 |pages=645–647 |bibcode=2008Palai..23..645M |doi=10.2110/palo.2008.p08-030r}}</ref>

A set of footprints in Glenrock, Wyoming dating to the [[Maastrichtian]] stage of the Late Cretaceous and hailing from the [[Lance Formation]] were described by Scott Persons, Phil Currie and colleagues in 2016, and are believed to belong to either a juvenile ''T. rex'' or the dubious tyrannosaurid ''Nanotyrannus lancensis''. From measurements and based on the positions of the footprints, the animal was believed to be traveling at a walking speed of around 2.8 to 5 miles per hour and was estimated to have a hip height of {{convert|1.56|to|2.06|m|ft|abbr=on}}.<ref>{{Cite journal |last1=Smith |first1=S. D. |last2=Persons |first2=W. S. |last3=Xing |first3=L. |year=2016 |title=A "Tyrannosaur" trackway at Glenrock, Lance Formation (Maastrichtian), Wyoming |url=https://www.sciencedaily.com/releases/2016/01/160116214746.htm |journal=Cretaceous Research |volume=61 |issue=1 |pages=1–4 |doi=10.1016/j.cretres.2015.12.020 |bibcode=2016CrRes..61....1S |archive-date=July 11, 2019 |access-date=March 9, 2018 |archive-url=https://web.archive.org/web/20190711130653/https://www.sciencedaily.com/releases/2016/01/160116214746.htm |url-status=live }}</ref><ref>{{Cite journal |last=Perkins |first=S. |year=2016 |title=You could probably have outrun a ''T. rex'' |url=https://www.science.org/content/article/you-could-probably-have-outrun-t-rex |journal=Palaeontology |doi=10.1126/science.aae0270 |archive-date=October 3, 2022 |access-date=June 30, 2022 |archive-url=https://web.archive.org/web/20221003205139/https://www.science.org/content/article/you-could-probably-have-outrun-t-rex |url-status=live }}</ref><ref>{{cite news |url=https://www.usatoday.com/story/news/2016/01/27/tyrannosaurs-faster-than-velociraptors/79423372/ |title=Forget all you know from Jurassic Park: For speed, ''T. rex'' beats ''velociraptor''s |last=Walton |first=T. |access-date=March 13, 2016 |newspaper=USA Today |year=2016 |archive-date=August 19, 2018 |archive-url=https://web.archive.org/web/20180819045903/https://www.usatoday.com/story/news/2016/01/27/tyrannosaurs-faster-than-velociraptors/79423372/ |url-status=live }}</ref> A follow-up paper appeared in 2017, increasing the speed estimations by 50–80%.<ref>{{Cite journal |last=Ruiz |first=J. |year=2017 |title=Comments on "A tyrannosaur trackway at Glenrock, Lance Formation (Maastrichtian), Wyoming" (Smith et al., ''Cretaceous Research'', v. 61, pp. 1–4, 2016) |journal=Cretaceous Research |volume=82 |pages=81–82 |doi=10.1016/j.cretres.2017.05.033}}</ref>