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Posts by Marcos K. Pinheiro / "Marcos Wyvern" (Marcosaurus)

🦖⚖️ Major dinosaur repatriation news: Irritator is finally going home!

After years of tireless work by @alinemghilardi.bsky.social and colleagues, #IrritatorBelongstoBR is finally becoming reality. This is a milestone for decolonising palaeontology; thread to follow very soon!

13 hours ago 37 14 0 0
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Tivemos uma atualização, pessoal: 😌

19 hours ago 36 8 3 2
Captura de tela de uma página do site do governo brasileiro (gov.br), acessada pelo celular, com cabeçalho do Ministério das Relações Exteriores. O texto destacado aborda cooperação internacional sobre fósseis entre Brasil e Alemanha, mencionando o acordo de cessão do fóssil de Irritator challengeri ao Brasil pelo estado de Baden-Württemberg e pelo Museu Estatal de História Natural de Stuttgart.

Captura de tela de uma página do site do governo brasileiro (gov.br), acessada pelo celular, com cabeçalho do Ministério das Relações Exteriores. O texto destacado aborda cooperação internacional sobre fósseis entre Brasil e Alemanha, mencionando o acordo de cessão do fóssil de Irritator challengeri ao Brasil pelo estado de Baden-Württemberg e pelo Museu Estatal de História Natural de Stuttgart.

🚨🚨ATENÇÃO, GALERINHA! 🚨🚨

Tá vindo aí: www.gov.br/mre/pt-br/ca...

1 day ago 126 32 11 16
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O retorno de fósseis como o Irritator é relevante porque envolve não apenas a devolução de um exemplar científico importante, mas de um patrimônio que integra a história natural de um país. 🦖🇧🇷

(Arte de @heitoresco.bsky.social)

12 hours ago 95 35 1 5
a four panel comic. 
in the first panel, a robin hops along a trail saying "lovely!"
in the second panel, the robin perches on a tree with pink flowers and says "beautiful!"
in the third panel, they look up at a white flower and say "fantastic!"
in the final panel, their eye is up close to a pink flower and they say "wow" repetitively.

a four panel comic. in the first panel, a robin hops along a trail saying "lovely!" in the second panel, the robin perches on a tree with pink flowers and says "beautiful!" in the third panel, they look up at a white flower and say "fantastic!" in the final panel, their eye is up close to a pink flower and they say "wow" repetitively.

do birds experience spring like we do? i like to think so. at least a little bit.

read how the comic was made: beccagoesoutside.ghost.io/comic-signs-...

#birds #illustration 🌎 🌿🦉 #wildlife #nature

11 hours ago 169 50 3 1

Damn. This is heartbreaking. Poor sloths.

11 hours ago 1 0 0 0
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キョウリュウガニ

18 hours ago 268 60 3 4
a figure from the paper showing 4 modes of locomotion for archaeopteryx
A) flying
B) perching
C) gliding
D) climbing

a figure from the paper showing 4 modes of locomotion for archaeopteryx A) flying B) perching C) gliding D) climbing

great new #openaccess paper on archaeopteryx by o'konnor and clark 🐦 they explore the animal's ecology and modes of locomotion, offering new insight into archaeopteryx's lifestyle!
link.springer.com/article/10.1...
(art commissioned at the chicago field museum)

15 hours ago 31 10 0 1
two views of the holotype skull of the brazilian spinosaurid irritator challengeri

two views of the holotype skull of the brazilian spinosaurid irritator challengeri

guess who's going home at last 🎉 #IrritatorBelongstoBR #DecoloniseScience

18 hours ago 80 25 1 3
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The ecology of Archaeopteryx - Discover Ecology Discover Ecology - As the oldest known dinosaur to use aerodynamic surfaces comprised of asymmetrical feathers for flight, Archaeopteryx undoubtedly occupied a unique ecological niche unlike that...

A ecologia do Archaeopteryx link.springer.com/article/10.1...

15 hours ago 4 2 0 0
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These tiny dinosaur fossils fooled scientists for 20 years Tiny dinosaur fossils that puzzled scientists for over 20 years have finally revealed their true identity. Rather than belonging to a miniature species, they are actually baby ankylosaurs—some less th...

www.sciencedaily.com/releases/202...

14 hours ago 2 0 0 0
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Early humans turned favored rock sites into toolmaking assembly lines Such prescient planning started 50,000 years earlier than thought, study finds

Scientists recently unearthed a 220,000-year-old quarry that humans repeatedly visited for tens of thousands of years.

The extraordinary site suggests humans had favored rock spots for tools much earlier than previously believed.

#Archaeology #Paleoanthropology

🧪🏺

New at @science.org

17 hours ago 40 12 0 4
Three panel comic. Panel 1: person who has post-op bandages wrapped around their nose, nervously holding someone’s hand. Another speaker off panel says, “alright… let’s get these bandages off.” Panel 2: the person is gleefully looking at themself in a handheld mirror, their friends are overjoyed. Their new nose is a gigantic, elongated and pointed sword shape. Panel 3: they are jumping out of the ocean with a smile on their face, in unison with two swordfish who are also breaching the water.

Three panel comic. Panel 1: person who has post-op bandages wrapped around their nose, nervously holding someone’s hand. Another speaker off panel says, “alright… let’s get these bandages off.” Panel 2: the person is gleefully looking at themself in a handheld mirror, their friends are overjoyed. Their new nose is a gigantic, elongated and pointed sword shape. Panel 3: they are jumping out of the ocean with a smile on their face, in unison with two swordfish who are also breaching the water.

17 hours ago 6117 814 50 30
Diagram showing hypothesized life history and ecological relationships of the bird-like dinosaur Archaeopteryx.

Diagram showing hypothesized life history and ecological relationships of the bird-like dinosaur Archaeopteryx.

Review of the ecology of Archaeopteryx: link.springer.com/article/10.1... 🪶🧪 (📷NICE PaleoVisLab studio & Samantha Clark)

15 hours ago 52 19 0 1
Angled down image of a rattlesnake, partially buried in sand and facing left. The snake’s colors match its sandy surroundings.

Angled down image of a rattlesnake, partially buried in sand and facing left. The snake’s colors match its sandy surroundings.

I’m flying home from Phoenix today after spending a few days in northern Mexico. Here’s a sidewinder rattlesnake (Crotalus cerastes) observed in the light of morning at El Pinacate and Gran Altar Desert Natl Park. These are sandy habitat specialists as the photo suggests. #herps #snakes 🌿

17 hours ago 77 16 1 1
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Former Presidents Clinton, Bush, Obama and Biden reveal why they have hope for America’s future The four former presidents spoke to Jenna Bush Hager in a "TODAY" exclusive about what message they have for Americans ahead of the nation's 250th anniversary.

Former Presidents Joe Biden, Barack Obama, George W. Bush and Bill Clinton are sharing a message of optimism with Americans as the nation approaches its 250th anniversary.

15 hours ago 31 7 6 6
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First record of neosuchian crocodyliforms from Missão Velha Formation (Upper Jurassic-Lower Cretaceous), Araripe Basin Crocodyliformes are relatively scarce in Jurassic and Lower Cretaceous outcrops from Brazil, with most of this record being from fragmentary specimens…

www.sciencedirect.com/science/arti...

15 hours ago 2 1 0 0
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Smilodon fatalis canine and alveolus junction gap: Using MicroCT scans and 3D Slicer Abstract. The cranium of the sabertooth cat Smilodon fatalis from Rancho La Brea, now called La Brea Tar Pits and Museum (LBTPM), has been extensively stud

academic.oup.com/iob/advance-...

17 hours ago 2 1 0 0
Earth Day 2026: Carbon Catchers
Earth Day 2026: Carbon Catchers YouTube video by American Museum of Natural History

🌎In celebration of #EarthDay, watch this video by the Museum's Science Visualization team to learn how animals and plants work together to store carbon and stabilize our climate.

1 day ago 40 15 0 0
One of the most famous mosasaurs, Tylosaurus proriger, submerges after taking a breath. It is dark above and light below, as tentatively suggested by some palaeocolour data. The challenges of interpreting scaly reptile palaeocolour, and the tiny scraps of colour data we have for this animal, preclude much confidence in chromatic interpretations of this species, however. 

Also, if you stare at this long enough, you'll see a few sharks. No foolin'.

One of the most famous mosasaurs, Tylosaurus proriger, submerges after taking a breath. It is dark above and light below, as tentatively suggested by some palaeocolour data. The challenges of interpreting scaly reptile palaeocolour, and the tiny scraps of colour data we have for this animal, preclude much confidence in chromatic interpretations of this species, however. Also, if you stare at this long enough, you'll see a few sharks. No foolin'.

Been thinking marine-reptiley thoughts today. Here's one of my latest #paleoart efforts along that line: Tylosaurus proriger. The colour is based on fossil colour data, although it's far from certain that this animal was black and countershaded.

Print link: www.markwitton.co.uk/product-page...

1 day ago 250 80 12 0
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Dinossauro será devolvido ao BR após 3 anos de tratativas Fóssil do dinossauro Irritator challengeri ficará no museu de Santana do Cariri (CE). Ainda não há data oficial para o retorno

#IrritatorBelongsToBR
#FossilRepatriation
#DecolonizeScience
Irritator vai voltar ao Brasil!
Viva! Viva!
🦖💀🏞🌎🇧🇷
mais.opovo.com.br/colunistas/c...

19 hours ago 11 3 0 0
Video

Agami Herons.

1 day ago 3984 542 102 31
Video

Dunkleosteus terrelli

[ #paleoart | #fish | #dunkleosteus | #3Dart | #art ]

10 months ago 160 50 1 0
Video

Quetzalcoatlus northropi

[ #paleoart | #pterosaurs | #quetzalcoatlus | #3Dart | #art ]

9 months ago 146 46 2 0
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Rediscovered tracksite reveals large dinosaurs ranged as far as northern Mongolia 120 million years ago An international research team has rediscovered a dinosaur tracksite in the Saijrakh area of northern Mongolia. The site was originally reported about 70 years ago but had since been lost due to a lac...

phys.org/news/2026-04...

20 hours ago 6 1 0 0
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Rockhampton Gears Up for Dinosaur Week Roar 380 million years of history will be on display during two dino-mite events, when Queensland Dinosaur Week arrives in Rockhampton and Mount Morgan

www.miragenews.com/rockhampton-...

1 day ago 3 1 0 0
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Doodles from last last Friday's flocking #paleostream featuring Brachiosaurus, Centrosaurus, Rauisuchus, and Muttaburrasaurus.

1 day ago 117 29 1 0
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The morning mist hovers over the silhouetted vista as the distant mountains are woken by pre daybreak light.  The waterway is calm as it holds the reflection while edged with auburn grasses.

The morning mist hovers over the silhouetted vista as the distant mountains are woken by pre daybreak light. The waterway is calm as it holds the reflection while edged with auburn grasses.

The morning arrived 📷🕊️ …

1 day ago 1332 174 40 1
Skull diagram of Paraentelodon intermedium in various orthographic angles. Different angles going clockwise starting top left: Anterior, posterior, dorsal, left lateral, ventral, left diagonal with mouth closed, left diagonal with mouth open.

Skull diagram of Paraentelodon intermedium in various orthographic angles. Different angles going clockwise starting top left: Anterior, posterior, dorsal, left lateral, ventral, left diagonal with mouth closed, left diagonal with mouth open.

Paraentelodon intermedium skull diagram.

#sciart #paleoart #paleontology

1 day ago 92 21 0 1
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#MesozoicLifeStories
Update 19
River of Giants
Progress Update 10
April 20, 2026
"...once the SFM pre-animation is finished and exported to Blender, we will move on to the polishing and correction phase, guided by the paleontologist Dr. Darren Naish"
🦖🏞🌍
www.kickstarter.com/projects/mes...

1 day ago 21 6 1 0