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I watched the Dinosaur Apocalypse videos on PBS narrated by David Attenborough, link to TFF thread posted here, http://www.thefossilforum.com/index.php?/topic/123230-tv-tonight/&tab=comments#comment-1345385 I will let others debate the specifics in the other thread, I don't have the experience to criticize/celebrate any of it. Something I noticed in the second video, The Last Day, was this map of the United States depicting the Western Interior Seaway at 17:44 in the video. Here are a few cities in the area I plotted. Everything else I had heard and all the other maps I've seen have shown the Western Interior Seaway much farther east than this map, east of the Rocky Mountains, running north to south through the great plains. Is there something I missed? It seems like a fairly large error seeing as the Western Interior Seaway played an important part in the videos. I'd appreciate any and all help, thank you.

There are several images, videos, and interactive websites that show what Earth looked like millions of years ago. I was wondering which ones do you use and which are most accurate.

Utahs top Paleontologist Jim Kirkland posted this chart on the dinosaur fauna in his state. Pretty amazing diversity See below for an enhanced poster into the triassic

Devonian trilobites of Gondwana studied with newer mathematical models to determine evolutionary connections https://phys.org/news/2019-01-reconstruction-trilobite-ancestral-range-southern.amp

Regarding the geographic distribution of desmostylians, it's quite ironic that no desmostylians have ever been found in the West Indies or eastern North America or even Africa because DNA studies point to an African origin for all afrotheres and desmostylians themselves are afrotheres (as a matter of fact, a sirenian fossil from the Early Eocene of Tunisia described by Benoit et. al. 2013 is about the same age as the Caribbean forms Prorastomus and Pezosiren, confirming that sirenians did indeed originate in Africa along with other afrothere groups). What would be a possible explanation for the absence of desmostylians from Africa if an African origin of afrotheres implies that Desmostylia originated in Africa? Benoit J, Adnet S, El Mabrouk E, Khayati H, Ben Haj Ali M, et al. (2013) Cranial Remain from Tunisia Provides New Clues for the Origin and Evolution of Sirenia (Mammalia, Afrotheria) in Africa. PLoS ONE 8(1): e54307. doi:10.1371/journal.pone.0054307