Uploaded November 2017 | Updated September 2026, 17 hours ago

---

Link to Part 1: youtu.be/1sJOR1kR8dQ
Carr and Brusatte 2016: nature.com/articles/srep20252
Loewen et al 2013: journals.plos.org/plosone/article?id=10.1371/journal.pone.0079420
Carr et al 2016: nature.com/articles/srep44942
Dr Carr's Personal Blog: tyrannosauroideacentral.blogspot.co.uk
Bell et al 2017: researchgate.net/publication/317384776_Tyrannosauroid_integument_reveals_conflicting_patterns_of_gigantism_and_feather_evolution

My Patreon: patreon.com/AKRex

Barett 2015: rsbl.royalsocietypublishing.org/content/11/6/20150229
Tianyulong: pdfs.semanticscholar.org/1744/d0f9e0ca9f4ea3be3608f1dfa890d06c8720.pdf
Mayr et al 2016: research-information.bristol.ac.uk/files/99863297/Psittacosaur_bristles_revision.pdf

Disclaimer: all images belong to their respective owners and are used for the sole purpose of demonstration and educational purposes.