Jeanne Timmons
@mostlymammoths.bsky.social
Freelance writer (she/her) interested in paleontology and archaeology. Avatar by Natalia Jagielska.
https://mostlymammoths.wordpress.com/freelance-work/
https://mostlymammoths.wordpress.com/freelance-work/
Pinned
"Do not get lost in a sea of despair. Do not become bitter or hostile. Be hopeful, be optimistic. Never, ever be afraid to make some noise and get in good trouble, necessary trouble. We will find a way to make a way out of no way." - the late Congressman John Lewis
Reposted by Jeanne Timmons
#FossilFriday: The Pacific mastodon, Mammut pacificus, known from California and Idaho. This species was described in 2019. This is the second of two species of Mammut from North America, the other being Mammut americanum.
January 30, 2026 at 6:16 PM
#FossilFriday: The Pacific mastodon, Mammut pacificus, known from California and Idaho. This species was described in 2019. This is the second of two species of Mammut from North America, the other being Mammut americanum.
Reposted by Jeanne Timmons
my 10 yr old nephew found this 11myo Gomphothere molar while hiking in Red Rock state park, calif many years ago. We took photos--then turned it over to park staff. They told my nephew that it was sent to the Natural History museum of L.A. with his name as discover. He was so proud!
#fossilfriday
#fossilfriday
January 30, 2026 at 7:37 PM
my 10 yr old nephew found this 11myo Gomphothere molar while hiking in Red Rock state park, calif many years ago. We took photos--then turned it over to park staff. They told my nephew that it was sent to the Natural History museum of L.A. with his name as discover. He was so proud!
#fossilfriday
#fossilfriday
Reposted by Jeanne Timmons
Deinotherium: Vintage X Contemporâneo
February 2, 2026 at 2:20 PM
Deinotherium: Vintage X Contemporâneo
Reposted by Jeanne Timmons
It is not often that I make a 2 #FossilFriday posts but, I will make an exception. This is the skeleton of the fish Xiphactinus audax. It was found by a friend looking fossils in the Late Cretaceous (Santonian) Smokey Hill Chalk in Kansas. You think you afraid of the ocean now? You've seen nothing!
February 7, 2026 at 12:02 AM
It is not often that I make a 2 #FossilFriday posts but, I will make an exception. This is the skeleton of the fish Xiphactinus audax. It was found by a friend looking fossils in the Late Cretaceous (Santonian) Smokey Hill Chalk in Kansas. You think you afraid of the ocean now? You've seen nothing!
Reposted by Jeanne Timmons
For #FossilFriday, we present Paulina Mühlmann. 🇦🇷
In 1935, she conducted the first geological field campaign by a woman at the University of Buenos Aires. She later became Chief of the Petrographic Lab at YPF, collecting key Paleozoic fossils. 🦕
#Geology #WomenInScience #Paleontology
In 1935, she conducted the first geological field campaign by a woman at the University of Buenos Aires. She later became Chief of the Petrographic Lab at YPF, collecting key Paleozoic fossils. 🦕
#Geology #WomenInScience #Paleontology
February 6, 2026 at 11:44 AM
For #FossilFriday, we present Paulina Mühlmann. 🇦🇷
In 1935, she conducted the first geological field campaign by a woman at the University of Buenos Aires. She later became Chief of the Petrographic Lab at YPF, collecting key Paleozoic fossils. 🦕
#Geology #WomenInScience #Paleontology
In 1935, she conducted the first geological field campaign by a woman at the University of Buenos Aires. She later became Chief of the Petrographic Lab at YPF, collecting key Paleozoic fossils. 🦕
#Geology #WomenInScience #Paleontology
Reposted by Jeanne Timmons
#FossilFriday Hildegarde Howard, American pioneer in avian paleontology, known for her discoveries in the La Brea Tar Pits, among them the Rancho La Brea eagles #FeministFriday 🧪⚒️
paleonerdish.wordpress.com/2019/05/01/f...
paleonerdish.wordpress.com/2019/05/01/f...
January 30, 2026 at 8:02 PM
#FossilFriday Hildegarde Howard, American pioneer in avian paleontology, known for her discoveries in the La Brea Tar Pits, among them the Rancho La Brea eagles #FeministFriday 🧪⚒️
paleonerdish.wordpress.com/2019/05/01/f...
paleonerdish.wordpress.com/2019/05/01/f...
Reposted by Jeanne Timmons
@uocas.bsky.social masters student and paleontologist Andy takes us behind the scenes to break down the tools she uses to work on Wally #paleosky #fossilfriday ⚒️🧰 🐋✨ 🧪🏛️
January 30, 2026 at 6:54 PM
@uocas.bsky.social masters student and paleontologist Andy takes us behind the scenes to break down the tools she uses to work on Wally #paleosky #fossilfriday ⚒️🧰 🐋✨ 🧪🏛️
Reposted by Jeanne Timmons
Since it's #haolong day and #fossilfriday here's some #iguanodontian specimens from Liaoning, spanning from 40 cm to over 8 m, many preserved with soft tissue.
February 7, 2026 at 12:06 AM
Since it's #haolong day and #fossilfriday here's some #iguanodontian specimens from Liaoning, spanning from 40 cm to over 8 m, many preserved with soft tissue.
Reposted by Jeanne Timmons
This is not the case for the spikes of Haolong. The spikes consist of layered cells, including a stratum corneum, stratum spinosum etc, with keratinocytes and visible nuclei. In other words, the spikes were living skin
February 7, 2026 at 1:01 AM
This is not the case for the spikes of Haolong. The spikes consist of layered cells, including a stratum corneum, stratum spinosum etc, with keratinocytes and visible nuclei. In other words, the spikes were living skin
Reposted by Jeanne Timmons
happy #FossilFriday. It is very early in the year and I already have a favorite paper with the newly described Haolong. HOWEVER, this is *not* a feathered dinosaur! The structures on Haolong are very different from filaments. A 🧵
February 7, 2026 at 12:58 AM
happy #FossilFriday. It is very early in the year and I already have a favorite paper with the newly described Haolong. HOWEVER, this is *not* a feathered dinosaur! The structures on Haolong are very different from filaments. A 🧵
Reposted by Jeanne Timmons
Huang, J., Wu, W., Mao, L. et al. Cellular-level preservation of cutaneous spikes in an Early Cretaceous iguanodontian dinosaur. Nat Ecol Evol (2026). doi.org/10.1038/s415...
Cellular-level preservation of cutaneous spikes in an Early Cretaceous iguanodontian dinosaur - Nature Ecology & Evolution
A juvenile iguanodontian from the Lower Cretaceous of China preserves both spikes and scales in its skin that are different from integumentary structures in either non-avian dinosaurs or extant squama...
doi.org
February 6, 2026 at 4:09 PM
Huang, J., Wu, W., Mao, L. et al. Cellular-level preservation of cutaneous spikes in an Early Cretaceous iguanodontian dinosaur. Nat Ecol Evol (2026). doi.org/10.1038/s415...
Reposted by Jeanne Timmons
The tail, similar to the Middle Jurassic Kulindadromeus, is covered in overlapping large scales, diminishing in size moving towards the end of the tail.
February 6, 2026 at 4:08 PM
The tail, similar to the Middle Jurassic Kulindadromeus, is covered in overlapping large scales, diminishing in size moving towards the end of the tail.
Reposted by Jeanne Timmons
As the name suggest, this new dinosaur species exhibits new integumentary structures never seen before in these dinosaurs, a wide array of small, medium and -relatively- large spikes on the body except of the tail.
February 6, 2026 at 4:08 PM
As the name suggest, this new dinosaur species exhibits new integumentary structures never seen before in these dinosaurs, a wide array of small, medium and -relatively- large spikes on the body except of the tail.
Reposted by Jeanne Timmons
Maybe a bit late for web timing, but ehy, NEW PAPER ON #fossilfriday!!!
I am proud to present you Haolong dongi gen. nov. sp. nov., a new hadrosauroid from the Early Cretaceous of China!
The specimen, almost complete, is a juvenile iguanodontian from the Yixian Formation of the Barremian (125 Mya).
I am proud to present you Haolong dongi gen. nov. sp. nov., a new hadrosauroid from the Early Cretaceous of China!
The specimen, almost complete, is a juvenile iguanodontian from the Yixian Formation of the Barremian (125 Mya).
February 6, 2026 at 4:07 PM
Maybe a bit late for web timing, but ehy, NEW PAPER ON #fossilfriday!!!
I am proud to present you Haolong dongi gen. nov. sp. nov., a new hadrosauroid from the Early Cretaceous of China!
The specimen, almost complete, is a juvenile iguanodontian from the Yixian Formation of the Barremian (125 Mya).
I am proud to present you Haolong dongi gen. nov. sp. nov., a new hadrosauroid from the Early Cretaceous of China!
The specimen, almost complete, is a juvenile iguanodontian from the Yixian Formation of the Barremian (125 Mya).
Reposted by Jeanne Timmons
In light of today’s palaeo news, and whilst not claiming to be a visionary genius or anything (that’s for history to judge… 😉) I’m just gonna drop my illustration of a quilled and spiky iguanodon from back in 2021.
Sometimes you don’t need to be good. Just lucky.
www.nature.com/articles/s41...
Sometimes you don’t need to be good. Just lucky.
www.nature.com/articles/s41...
February 6, 2026 at 5:56 PM
In light of today’s palaeo news, and whilst not claiming to be a visionary genius or anything (that’s for history to judge… 😉) I’m just gonna drop my illustration of a quilled and spiky iguanodon from back in 2021.
Sometimes you don’t need to be good. Just lucky.
www.nature.com/articles/s41...
Sometimes you don’t need to be good. Just lucky.
www.nature.com/articles/s41...
Reposted by Jeanne Timmons
Um marlim fóssil, de idade miocenica (mais de +7 milhões de anos atrás) encontrado no Panama, em exibição no Biomuseo, Cidade do Panama. #FossilFriday
February 6, 2026 at 1:02 PM
Um marlim fóssil, de idade miocenica (mais de +7 milhões de anos atrás) encontrado no Panama, em exibição no Biomuseo, Cidade do Panama. #FossilFriday
Reposted by Jeanne Timmons
A bit more refining on this woolly friend! Blender hair is tricky.
February 5, 2026 at 8:57 PM
A bit more refining on this woolly friend! Blender hair is tricky.
Reposted by Jeanne Timmons
For #FossilFriday , preserved fur and osteoderms (base for underlying armor) of Darwin's ground sloth, Mylodon darwinii
February 6, 2026 at 8:11 PM
For #FossilFriday , preserved fur and osteoderms (base for underlying armor) of Darwin's ground sloth, Mylodon darwinii
Reposted by Jeanne Timmons
The first paper of my PhD thesis, and first solo authored paper is out today!
It you like dinosaur footprints or history, this is for you!
Open access via this link- www.sciencedirect.com/science/arti...
It you like dinosaur footprints or history, this is for you!
Open access via this link- www.sciencedirect.com/science/arti...
February 6, 2026 at 8:56 AM
The first paper of my PhD thesis, and first solo authored paper is out today!
It you like dinosaur footprints or history, this is for you!
Open access via this link- www.sciencedirect.com/science/arti...
It you like dinosaur footprints or history, this is for you!
Open access via this link- www.sciencedirect.com/science/arti...
Reposted by Jeanne Timmons
For #FossilFriday, exquisitely preserved insect burrows (probably beetles) with backfill structure preserved as bas relief on a sandstone surface, from the Early Cretaceous (~130 mya) Botucatu Formation of Brazil. Specimen on display in the Mário Tolentino Museum of Science, São Carlos, Brazil. 🧪🪲🪨⚒️
February 6, 2026 at 1:23 PM
For #FossilFriday, exquisitely preserved insect burrows (probably beetles) with backfill structure preserved as bas relief on a sandstone surface, from the Early Cretaceous (~130 mya) Botucatu Formation of Brazil. Specimen on display in the Mário Tolentino Museum of Science, São Carlos, Brazil. 🧪🪲🪨⚒️
Reposted by Jeanne Timmons
Happy #FossilFriday! Check out some exciting research that came out last year about tracksites in Chile, made possible in part by a grant from the Jurassic Foundation.
Congratulations to the authors!
DOI doi.org/10.1186/s133...
Congratulations to the authors!
DOI doi.org/10.1186/s133...
February 6, 2026 at 7:06 PM
Happy #FossilFriday! Check out some exciting research that came out last year about tracksites in Chile, made possible in part by a grant from the Jurassic Foundation.
Congratulations to the authors!
DOI doi.org/10.1186/s133...
Congratulations to the authors!
DOI doi.org/10.1186/s133...
A 95 million year old angiosperm leaf preserved as an impression in an iron-cemented sandstone. The original leaf may have gone, but you can still see where invertebrates nibbled it.
From Dakota Formation, Kansas. Cenomanian, probably.
#FossilFriday ⚒🌏🔬🌱🍃🌳
From Dakota Formation, Kansas. Cenomanian, probably.
#FossilFriday ⚒🌏🔬🌱🍃🌳
February 7, 2026 at 3:35 PM
Reposted by Jeanne Timmons
Reposting this old photo for #FossilFriday: what you are looking at is a fragment of Callixylon wood from the Late Devonian, about 360 million years ago, seen under the microscope. The elongated structures are the conducting cells & there's a hair on the right for scale. 🔬🌿⛏️
#paleobotany
#paleobotany
February 6, 2026 at 1:20 PM
Reposting this old photo for #FossilFriday: what you are looking at is a fragment of Callixylon wood from the Late Devonian, about 360 million years ago, seen under the microscope. The elongated structures are the conducting cells & there's a hair on the right for scale. 🔬🌿⛏️
#paleobotany
#paleobotany