Tim Demko
@timdemko.xyz
Geologist interested in the energy transition, bicycling, and public service
https://bio.link/timdemko
https://orcid.org/0000-0002-9125-0907
https://www.semanticscholar.org/author/Timothy-Michael-Demko/15743754
https://bio.link/timdemko
https://orcid.org/0000-0002-9125-0907
https://www.semanticscholar.org/author/Timothy-Michael-Demko/15743754
Reposted by Tim Demko
I know the year is almost over, but maybe you have some time left before the holidays to squeeze in one more Hell Creek Formation paper?
New paper on a discovery from the Hell Creek Formation of North Dakota from an international team of researchers drops next week. Watch this space...
New paper on a discovery from the Hell Creek Formation of North Dakota from an international team of researchers drops next week. Watch this space...
a close up of a man wearing glasses and a tie
ALT: a close up of a man wearing glasses and a tie
media.tenor.com
December 5, 2025 at 6:23 PM
I know the year is almost over, but maybe you have some time left before the holidays to squeeze in one more Hell Creek Formation paper?
New paper on a discovery from the Hell Creek Formation of North Dakota from an international team of researchers drops next week. Watch this space...
New paper on a discovery from the Hell Creek Formation of North Dakota from an international team of researchers drops next week. Watch this space...
Reposted by Tim Demko
The Bay took over the highway during this morning's #KingTides in Marin.
December 4, 2025 at 10:25 PM
The Bay took over the highway during this morning's #KingTides in Marin.
Reposted by Tim Demko
Quickish Nanotyrannus lethaeus anatomy study.
Really cool to see two papers more or less back to back that very conclusively reestablish NanoT as a distinct taxon.
Really cool to see two papers more or less back to back that very conclusively reestablish NanoT as a distinct taxon.
December 5, 2025 at 1:44 AM
Quickish Nanotyrannus lethaeus anatomy study.
Really cool to see two papers more or less back to back that very conclusively reestablish NanoT as a distinct taxon.
Really cool to see two papers more or less back to back that very conclusively reestablish NanoT as a distinct taxon.
Reposted by Tim Demko
Reposted by Tim Demko
Better (Bighorn Mountains, work in progress).
December 5, 2025 at 2:35 AM
Better (Bighorn Mountains, work in progress).
Reposted by Tim Demko
I passed out some pdfs of this paper yesterday, but I'm thrilled to say that the Morrison Ankylosaur monograph is on line. Hopefully this will aid in folks needing Jurassic ankylosaur character states. giw.utahgeology.org/giw/index.ph... @utahpaleo-ufop.bsky.social @societyofvertpaleo.bsky.social
December 4, 2025 at 9:53 PM
I passed out some pdfs of this paper yesterday, but I'm thrilled to say that the Morrison Ankylosaur monograph is on line. Hopefully this will aid in folks needing Jurassic ankylosaur character states. giw.utahgeology.org/giw/index.ph... @utahpaleo-ufop.bsky.social @societyofvertpaleo.bsky.social
Reposted by Tim Demko
Big news! We have a follow-up to Farside Seismic Suite called South Pole Seismic Station selected that will build a new seismic station that can be deployed by Artemis IV astronauts including an active source survey. More to come, but here's the release: science.nasa.gov/missions/art...
NASA Selects 2 Instruments for Artemis IV Lunar Surface Science - NASA Science
NASA has selected two science instruments designed for astronauts to deploy on the surface of the Moon during the Artemis IV mission to the lunar south polar
science.nasa.gov
December 4, 2025 at 10:09 PM
Big news! We have a follow-up to Farside Seismic Suite called South Pole Seismic Station selected that will build a new seismic station that can be deployed by Artemis IV astronauts including an active source survey. More to come, but here's the release: science.nasa.gov/missions/art...
Reposted by Tim Demko
🌟OPEN ACCESS🌟 What does a fault’s subsurface structure looks like? This question can be surprisingly tricky, but a new #Python package might help. Find out more in #SRL⚒️
pubs.geoscienceworld.org/ssa/srl/arti...
pubs.geoscienceworld.org/ssa/srl/arti...
December 4, 2025 at 9:02 PM
🌟OPEN ACCESS🌟 What does a fault’s subsurface structure looks like? This question can be surprisingly tricky, but a new #Python package might help. Find out more in #SRL⚒️
pubs.geoscienceworld.org/ssa/srl/arti...
pubs.geoscienceworld.org/ssa/srl/arti...
Reposted by Tim Demko
Rethinking Global Soil Degradation: Drivers, Impacts, and Solutions🔓- Shokri - 2025 - Reviews of Geophysics - Wiley Online Library agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Rethinking Global Soil Degradation: Drivers, Impacts, and Solutions
Key soil degradation processes, for example, compaction, erosion, salinization, acidification, alkalization, or nutrient loss, are examined Major drivers such as deforestation and unsustainable f...
agupubs.onlinelibrary.wiley.com
December 4, 2025 at 10:55 AM
Rethinking Global Soil Degradation: Drivers, Impacts, and Solutions🔓- Shokri - 2025 - Reviews of Geophysics - Wiley Online Library agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by Tim Demko
Our new publication in Nature Communications!
We show experimentally for the first time that slow-earthquake statistical features by shearing a fluid lubricated granular layer.
👉 Read the full article: www.nature.com/articles/s41...
#experiment
#geophysics
#softmatter
@natcomms.nature.com
We show experimentally for the first time that slow-earthquake statistical features by shearing a fluid lubricated granular layer.
👉 Read the full article: www.nature.com/articles/s41...
#experiment
#geophysics
#softmatter
@natcomms.nature.com
Origin of slow earthquake statistics in low-friction soft granular shear - Nature Communications
What makes slow earthquakes “slower” than ordinary earthquakes has long been enigmatic. This study presents the experimental reproduction of multiple slow earthquake statistics by shearing soft hydrog...
www.nature.com
December 4, 2025 at 11:49 AM
Our new publication in Nature Communications!
We show experimentally for the first time that slow-earthquake statistical features by shearing a fluid lubricated granular layer.
👉 Read the full article: www.nature.com/articles/s41...
#experiment
#geophysics
#softmatter
@natcomms.nature.com
We show experimentally for the first time that slow-earthquake statistical features by shearing a fluid lubricated granular layer.
👉 Read the full article: www.nature.com/articles/s41...
#experiment
#geophysics
#softmatter
@natcomms.nature.com
Reposted by Tim Demko
I think this research is very cool. www.bbc.com/news/article...
Volcanic eruption may have triggered Europe's Black Death plague
A volcanic eruption may have set off a chain reaction that led to Europe's deadliest pandemic.
www.bbc.com
December 4, 2025 at 7:47 PM
I think this research is very cool. www.bbc.com/news/article...
Reposted by Tim Demko
A diminutive tyrannosaur lived alongside Tyrannosaurus rex | Science www.science.org/doi/10.1126/...
A diminutive tyrannosaur lived alongside Tyrannosaurus rex
Whether Nanotyrannus lancensis represents a distinct taxon or an immature Tyrannosaurus rex is a decades-long controversy. The N. lancesis holotype is an isolated skull and ceratobranchials, but limb ...
www.science.org
December 4, 2025 at 7:07 PM
A diminutive tyrannosaur lived alongside Tyrannosaurus rex | Science www.science.org/doi/10.1126/...
Reposted by Tim Demko
New idea for a paper that will definitely get published in Science:
"Small crinoid Nanotyrannocrinus lived at the same time as well-known, somewhat bigger crinoid Tyrannocrinus"
"Small crinoid Nanotyrannocrinus lived at the same time as well-known, somewhat bigger crinoid Tyrannocrinus"
A diminutive tyrannosaur lived alongside Tyrannosaurus rex | Science www.science.org/doi/10.1126/...
A diminutive tyrannosaur lived alongside Tyrannosaurus rex
Whether Nanotyrannus lancensis represents a distinct taxon or an immature Tyrannosaurus rex is a decades-long controversy. The N. lancesis holotype is an isolated skull and ceratobranchials, but limb ...
www.science.org
December 4, 2025 at 7:14 PM
New idea for a paper that will definitely get published in Science:
"Small crinoid Nanotyrannocrinus lived at the same time as well-known, somewhat bigger crinoid Tyrannocrinus"
"Small crinoid Nanotyrannocrinus lived at the same time as well-known, somewhat bigger crinoid Tyrannocrinus"
Reposted by Tim Demko
Paper by @griffinlabpaleo.bsky.social independently revalidates Nanotyrannus lancensis using different methodology from the recent Zanno & Napoli paper. But what I'm most excited about is the Coelophysis hyoid histology is finally out too! www.science.org/doi/10.1126/...
December 4, 2025 at 7:37 PM
Paper by @griffinlabpaleo.bsky.social independently revalidates Nanotyrannus lancensis using different methodology from the recent Zanno & Napoli paper. But what I'm most excited about is the Coelophysis hyoid histology is finally out too! www.science.org/doi/10.1126/...
Reposted by Tim Demko
New research on a hot topic -
histology of the holotype supports Nanotyrannus as distinct from T. rex.
www.science.org/doi/10.1126/...
histology of the holotype supports Nanotyrannus as distinct from T. rex.
www.science.org/doi/10.1126/...
December 4, 2025 at 7:43 PM
New research on a hot topic -
histology of the holotype supports Nanotyrannus as distinct from T. rex.
www.science.org/doi/10.1126/...
histology of the holotype supports Nanotyrannus as distinct from T. rex.
www.science.org/doi/10.1126/...
Reposted by Tim Demko
Eukaryogenesis was a billion year spree, but the acquisition of mitochondria happened when the party was winding down www.nature.com/articles/s41...
Dated gene duplications elucidate the evolutionary assembly of eukaryotes - Nature
Analysis of eukaryotic gene sequences using a relaxed molecular clock methodology indicate that eukaryotes emerged 3.0–2.25 billion years ago as a result of mitochondrial endosymbiosis with complex ar...
www.nature.com
December 3, 2025 at 7:55 PM
Eukaryogenesis was a billion year spree, but the acquisition of mitochondria happened when the party was winding down www.nature.com/articles/s41...
Reposted by Tim Demko
What?
"A 501(c)(3) non-profit"
"A 501(c)(3) non-profit"
December 4, 2025 at 3:44 PM
What?
"A 501(c)(3) non-profit"
"A 501(c)(3) non-profit"
Reposted by Tim Demko
New this year: a fossil crustacean preserved in this manner that displays the sternum (underbelly) complete with food groove, and possible labrum in part I! These animals may have been up to 10 mm long and may resemble modern fairy shrimp #Crustmas 🧪
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
December 4, 2025 at 5:11 PM
New this year: a fossil crustacean preserved in this manner that displays the sternum (underbelly) complete with food groove, and possible labrum in part I! These animals may have been up to 10 mm long and may resemble modern fairy shrimp #Crustmas 🧪
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Reposted by Tim Demko
Just yesterday in one of my classes I talked about how the Bering land-bridge connection allowed Pleistocene megafauna into North America, but had no idea a Miocene (23 mya) land-bridge did the same with megafauna from Europe. Cool research about cool-adapted Canadian rhinos. 🧪🦏
A 23-million-year-old rhinoceros fossil is reshaping scientists' understanding of mammal evolution. n.pr/4plIDcz
This High Arctic rhino may change what we know about ancient animal migrations
A 23-million-year-old rhinoceros fossil is reshaping scientists' understanding of mammal evolution.
n.pr
December 4, 2025 at 12:23 PM
Just yesterday in one of my classes I talked about how the Bering land-bridge connection allowed Pleistocene megafauna into North America, but had no idea a Miocene (23 mya) land-bridge did the same with megafauna from Europe. Cool research about cool-adapted Canadian rhinos. 🧪🦏
Reposted by Tim Demko
A 23-million-year-old rhinoceros fossil is reshaping scientists' understanding of mammal evolution. n.pr/4plIDcz
This High Arctic rhino may change what we know about ancient animal migrations
A 23-million-year-old rhinoceros fossil is reshaping scientists' understanding of mammal evolution.
n.pr
December 4, 2025 at 11:41 AM
A 23-million-year-old rhinoceros fossil is reshaping scientists' understanding of mammal evolution. n.pr/4plIDcz
Reposted by Tim Demko
White board sketch from class on Tuesday:
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December 4, 2025 at 1:02 PM
White board sketch from class on Tuesday:
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⚒️
Reposted by Tim Demko
Greenland without its ice sheet looks like a big bath tub. Inside the ringing mountain ranges, the ice, covering 85% of Greenland, is a mile thick (1.7 km) on average.
The weight of this massive layer of frozen freshwater pushes down on the land, meaning the bedrock is mostly under sea level.
The weight of this massive layer of frozen freshwater pushes down on the land, meaning the bedrock is mostly under sea level.
December 4, 2025 at 1:42 PM
Greenland without its ice sheet looks like a big bath tub. Inside the ringing mountain ranges, the ice, covering 85% of Greenland, is a mile thick (1.7 km) on average.
The weight of this massive layer of frozen freshwater pushes down on the land, meaning the bedrock is mostly under sea level.
The weight of this massive layer of frozen freshwater pushes down on the land, meaning the bedrock is mostly under sea level.
Reposted by Tim Demko
Spoiler alert: the hidden source is the Earth.
Zanskar uses AI to identify hidden geothermal systems—and claims it has found one that could fuel a power plant, the first such discovery by industry in decades. www.wired.com/story/startu...
A Startup Says It Has Found a Hidden Source of Geothermal Energy
Zanskar uses AI to identify hidden geothermal systems—and claims it has found one that could fuel a power plant, the first such discovery by industry in decades.
www.wired.com
December 4, 2025 at 1:45 PM
Spoiler alert: the hidden source is the Earth.
Reposted by Tim Demko
"We need money to drill this wonderful huge resource to confirm how big it is" is sounds like every small oil company right before it goes under....
Very clearly using "AI" as hype for "we looked at a bunch of geologic factors we know from our training as geologists, but with Computer" too.
Very clearly using "AI" as hype for "we looked at a bunch of geologic factors we know from our training as geologists, but with Computer" too.
Zanskar uses AI to identify hidden geothermal systems—and claims it has found one that could fuel a power plant, the first such discovery by industry in decades. www.wired.com/story/startu...
A Startup Says It Has Found a Hidden Source of Geothermal Energy
Zanskar uses AI to identify hidden geothermal systems—and claims it has found one that could fuel a power plant, the first such discovery by industry in decades.
www.wired.com
December 4, 2025 at 1:55 PM
"We need money to drill this wonderful huge resource to confirm how big it is" is sounds like every small oil company right before it goes under....
Very clearly using "AI" as hype for "we looked at a bunch of geologic factors we know from our training as geologists, but with Computer" too.
Very clearly using "AI" as hype for "we looked at a bunch of geologic factors we know from our training as geologists, but with Computer" too.
Reposted by Tim Demko
Very nearly done on a long review of this spectacular book, King Tyrant by @markwitton.bsky.social, published by @princetonupress.bsky.social Cannot recommend it enough, buy it now! #dinosaurs #books
December 3, 2025 at 11:26 AM
Very nearly done on a long review of this spectacular book, King Tyrant by @markwitton.bsky.social, published by @princetonupress.bsky.social Cannot recommend it enough, buy it now! #dinosaurs #books