After an unfortunate fireworks incident Saturday where I broke my hand in five places (yes, I was that guy) I found myself with a LOT of time on my hands. Pun intended. I decided to binge the new face of YEC science: Nathaniel Jeanson. I watched the AiG videos linked earlier in the week featuring Jeanson. Viewed his debate with biologist Herman Mays and a follow-up video that Mays made. I read his journal articles on AiG (just search for them) and I bought the Kindle edition of his 2017 book Replacing Darwin and finished it today.

In everything that I read, there is one big, giant, plot-hole: Cenozoic mammal fossils

Cenozoic mammals are (according to “secular” science) thought to have lived within the last 66 million years. Think prehistoric mammoths, cave bears, giant sloths, etc.

All of the genetic examples that Jeanson provides for illustration (such as breeds of cows, breeds of dogs, or his favorite example the horse kind of zebras, horses, donkeys) are just above simple physical characteristics. We can get horses with red coats or stripes. We can get dogs with long fur or short curly hair. Like this picture here:

r/DebateEvolution - Giant Plot Hole in Jeanson's Theories

Page 19 of How Many Animals on the Ark by AiG

But what Jeanson doesn’t tell you is that the Ark Encounter features the cocker spaniel sized three-toed Messohippus as the ancestral Horse Kind. (see below) I haven’t seen any three-toed Zebras at the zoo lately…

r/DebateEvolution - Giant Plot Hole in Jeanson's Theories

Courtesy of Ark Encounter Blog

A big problem with the Cenozoic mammals hinges on the flood boundary. Jeanson seems to lean towards a Flood/post-flood boundary at the K-Pg, though remains undecided. The flood boundary is a MASSIVE issue. Where the flood ends should influence his entire genomic research. According to this AiG Article Jeanson admits that if we go with flood-boundary at K-Pg then all tertiary layers are post-flood. That means Pleistocene layers are Ice Age and the Ice Age happened after the flood. So “we have a tremendous amount of diversity to explain in a few hundred years.” A few hundred- NOT the 4600 years he includes as a variable in his book. We have tens of thousands of Ice Age camelid and mammoth fossils. Fossils! So how many were alive in the 300 years after the flood??

Later he writes, “This burst of diversification appears to have been followed by a burst of extinction.” He later admits that ” little overlap exists between the species found in the Tertiary and the species alive today.” Suspicious right?

In another article here he notes, “70% of the kinds of mammals that Noah brought on board the Ark died. This is not extinction by virtue of burial in the Flood. Rather, it’s extinction after the Flood.” So by the time of the ice age, most of the mammalian genera that had formed as well as a similar percentage of families that were taken on board the Ark all disappeared.

Jeanson does not attempt to hide the problem in his journal articles. He writes here that

In addition, with respect to the traditional scientific field by which the past has been interrogated— paleontology, lack of a comprehensive creationist model has hampered firm conclusions from being formed on the explosive speciation model.

He is saying the without a firm flood boundary we can’t form firm conclusions about the explosive speciation model. But that is almost the entire point of his book!

Of course, he knows that a late flood boundary makes his life easier. But the most active researching YEC paleontologist would tell him- don’t even go there. Dr. Marcus Ross disconfirms the late flood boundary here and here .

tldr; Jeanson’s work focuses largely on genetic changes of living mammals and totally ignores ALL of the fossil mammals of the Cenozoic

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