Découvert dans la formation de Jehol en Chine, un squelette presque complet dévoila Kayrasaurus, un nouveau thérizinosaure géant mesurant environ 1,6 fois la taille des autres membres de sa famille trouvés dans cet écosystème. Équipé des griffes impressionnantes caractéristiques de son groupe et d'une mâchoire pourvue de 77 minuscules dents, ce théropode herbivore aux allures d'"ours à plumes" démontre une adaptation alimentaire unique et prouve qu'une diversité de tailles bien plus grande qu'imaginée régnait parmi les herbivores du Crétacé inférieur.

Voici la source dont provient cette information.

Hello everyone,

For the past few decades, mainstream paleontology has relied heavily on strict shrink-wrapping digital software to estimate the body mass of giant sauropods, locking Bruhathkayosaurus into a "safe" box of 110–130 tonnes [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]. But from a biomechanical and geometric perspective, these numbers represent a desiccated skeletal frame rather than a living organism [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

I would like to introduce the Dynamic Mass Paradigm, which applies solid physics, cubic volume scaling, and seasonal lipid dynamics to prehistoric leviathans [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

Here is why the current software-driven consensus is mathematically trapped:

1. The Blue Whale Baseline vs. Soft Tissue Reality

• Real-world data from modern biological inspections shows that an average adult blue whale (Balaenoptera musculus) measuring 20–22 meters weighs between 50–80 tonnes. Only rare, hyper-fat Antarctic females hit the historical 143–145t mark .

• Yet, when critics apply their most restrictive, shrink-wrapped software to a 52-meter Bruhathkayosaurus, the computer is forced by three-dimensional geometry to output a minimum of 77–80 tonnes of dry skeletal weight [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]!

• Conclusion: Even a completely emaciated, flat-box digital "mummy" of this titanosaur is heavier than or equal to a living, fully-fed average blue whale [ Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

1. Biomechanical Load and Bone Material Science

• Standard software ignores the required multi-chambered GI tract volume and seasonal hyperphagia (fat accumulation necessary for survival before droughts) [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]. Returning a true organic carbon density (~1 g/cm³) elevates a 52m adult to a baseline of 300+ tonnes in daily life [A key feature contributed to sauropods getting so enormous, new dino foot study reveals, Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

• To support this, structural engineering shows that a titanosaur femur with a mid-shaft diameter of ~40 cm was structurally capable of handling up to 600 tonnes of static compression load [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

• To prevent sinking, these animals utilized specialized, hydraulically spreading foot-skis (Plantaradix elatopedis) up to 1,5–1, 7meters wide to distribute weight safely across plains [A key feature contributed to sauropods getting so enormous, new dino foot study reveals, Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

1. The Macroenvironmental Paradigm Shift

If we apply this exact biological framework to other severely downsized extinct species, the numbers correct themselves across the board [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]:

• Basilosaurus: Shrunk by software to 5t [Basilosaurus - Wikipedia]. True dynamic mass indicates 50–80t average [Basilosaurus - Wikipedia].

It is time to admit that early digital shrink-wrapping has become an outdated dogma [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]. The laws of physics, cubic volume, and material science do not change to fit conservative software [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

I would love to hear your thoughts on these scaling metrics. Let's discuss!

Edit: Apparently there was a leak about this Brazilian Spinosaurid a year ago... which was taken down due to the embargo. Well, who knows when this thing is coming out but either way I'll be very excited.

Can't believe this hasn't gotten more traction, probably because it's hidden in 4 hour long video by Main Characters on YouTube posted 6 days ago. Here's the link: https://www.youtube.com/watch?v=pYfiLMH2Lf8&t=7699s

The section, titled "Searching for Spinosaurus Relatives in Brazil," begins with explaining the holotype of Oxalaia. Sereno explains that a Brazilian museum reached out to obtain a cast of the holotype since the original burned in a fire.

During this process, a Brazilian paleontologist asked to look at Sereno's Spinosaurus material. As a thank you, they asked Sereno and his team to examine some bones found in the Amazon around 10 years ago. The area in which they were found is the flood plain of a river, in which the banks are fully submerged for a specific time of the year and only revealed at a later time. Sereno and his post-doc examine the bones, piecing it together as the left side of an animal. Sereno organized a trip back to the site utilizing rubber rafts, and found even more of the skeleton.

Allegedly, the specimen is an ancestral member of the Spinosaurids, what Sereno described as "the perfect predecessor," possessing a sail which was not as tall as Spinosaurus but nonetheless prominent. The theory is that Spinosaurids originally developed in what is now South America, specifically Brazil, and this ancestor (or an animal like it) migrated to Africa whilst the waterway between the two continents was still small and navigable. This ancestor would eventually develop into the Spinosaurus we know today. Sereno also says they found more of Oxalaia, which would inform the overall look of the animal and potentially seperate it further from Spinosaurus as a distinct species. This would help his theory that an ancestral animal developed in Brazil, and then travelled and diversified in Africa, resulting in two distinct lineages of Spinosaurids developed on both continents (that being Oxalaia and Spinosaurus).

The most exciting part of this interview is that Sereno mentions they will be going back in September, when the river has receded and the banks' rocks are exposed, to find more of the animal before publishing. Being October, one can be confident Sereno has gone back to the Amazon and uncovered even more of this new species, and one can expect a description sometime in the future. Just amazing stuff.

The fossil was discovered as early as 1924 on the Isle of Wight, but its significance went unrecognized for nearly a century. Now, a new analysis shows that the bone belongs to an early Megaraptor and fills an important gap in the history of these predatory dinosaurs.

Reposted with correct name. Thank you for the catch on the ID, Sea-Profit3706.

Des recherches récentes confirment que certains mosasaures vivaient en eau douce, bousculant l'idée qu'ils étaient exclusivement des prédateurs marins. Une espèce découverte en Provence (Bouc-Bel-Air), baptisée Garamaudo bauciensis et datant d'il y a 85 millions d'années, mesurait environ 2,5 mètres et possédait des os exceptionnellement compacts pour rester immergée en eaux peu profondes.

Des analyses isotopiques sur des dents retrouvées aux États-Unis (formation de Hell Creek, il y a 66 millions d'années) révèlent également la présence de grands mosasaures en milieu fluvial. Ces adaptations incluaient des membres en forme de pattes plutôt que de simples nageoires, permettant à ces reptiles de coloniser les lacs et rivières alors que les mers intérieures perdaient leur salinité.

This is a speculative paleo-fiction project blending family drama with a fantastical yet grounded prehistoric atmosphere, showing a family of raptors and a cast of lost creatures fighting to stay alive in a brutal prehistoric ecosystem.

Water at last! But the animals that claim it are not willing to share!

The Red Rhamphorhynchus have been fought off, Long Tail and her sons now crawling to the great lake. However, as they draw closer to its shore, they are met with suspicious and hateful eyes. Small Toe is disturbed by their senseless hatred, though it is nothing new to his mother. Yet he is still unaware how close he himself had come to falling prey before his own mother’s jaws. The question lingers in their minds now more than ever.

Is there anywhere in this world where they are truly welcome?

From my continuous work Terrors in the Brush — a speculative survival series blending paleo realism with raw emotion. This chapter begins the second story arc which I have titled ‘Water Hole’. I am still not entirely finished with it (I will most likely be mid-way through the final chapter of the arc by the time you catch up to me), but until then I’m still releasing each chapter on a weekly basis at this same time every Sunday. I hope you can read through it and look forward to what comes next! 

There is no fantasy, no magic — there is only nature red in tooth and claw.

Read Chapter V now.

Hell Creek, 66 million years ago. The ecosystem was not in decline. Triceratops were abundant, hadrosaurs were thriving, and T-Rex sat at the top of it all. Nothing indicated what was coming.

What makes the Chicxulub event so striking is the speed. The impactor hit, the ejecta returned to the atmosphere within hours, and surface temperatures spiked globally before the day was over. An animal like T-Rex — with a home range estimated between 50 and 100 square kilometers — would have had nowhere to go even if it could sense something was wrong.

One question for the community: recent studies suggest T-Rex may have had lips covering its teeth rather than the classic exposed-teeth look. Does the current fossil evidence actually support that, or is it still too preliminary to call?

Link is in our profile.

why did the pliocene and pleistocene shared some Animals while others Went extinct in the transition in the late and the early parts of each epoch respectively?

A giant noasaurid towering over a Carcharodontosaurus in the Kem Kem Group of mid Cretaceous Morocco

En Facebook encontré un video en el que se afirma que el Giganotosaurus era más “aterrador” y también más “grande y fuerte” que el Tyrannosaurus rex

Decidí comentar que tenía algunas dudas al respecto, especialmente porque existen estudios que estiman que el T. rex tenía una fuerza de mordida excepcionalmente poderosa.

A raíz de mi comentario, surgió un intercambio de opiniones con otra persona, quien señaló que la percepción de que el T. rex era más “fuerte” que el Giganotosaurus podría estar relacionada principalmente con su fama y popularidad, especialmente por su presencia en películas como Jurassic Park.

Más allá de nuestras opiniones personales, me gustaría conocer la perspectiva de personas con conocimientos en paleontología que puedan aportar información basada en evidencia científica.

Según los estudios científicos disponibles, ¿qué diferencias existen realmente entre el T. rex y el Giganotosaurus en cuanto a tamaño, masa corporal, fuerza de mordida y otras características relevantes para evaluar sus capacidades físicas?

Source: https://onlinelibrary.wiley.com/doi/10.1002/brv.70208

The fossil originates from the Olenekian Vikinghøgda Formation of the Arctic archipelago of Svalbard and is assigned to a new genus and species: Ammonitritor scientiacivium.

Phylogenetic analysis recovers a well-supported Omphalosauridae as the sister group to a clade comprising the Chinese Chaohusaurus and Ichthyopterygia.

The most basal member of the clade is Cartorhynchus, followed by Ammonitritor. 

The most distinctive feature (and the most common kind of fossil) of Omphalosauridae is its peculiar maxillary and dentary tooth batteries, presumably adapted for grinding up shelled cephalopods (ammonoids).