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University of Alberta Researchers Discover Evidence of Raptor Feeding on Tyrannosaur

University of Alberta Researchers Discover Evidence of Raptor Feeding on Tyrannosaur

Researchers at the University of Alberta have potentially uncovered the first evidence of a small raptor feeding on a much larger tyrannosaur. This discovery, led by paleontology master’s student Joshua Doyon, centers on unusual bite marks found on the jawbone of an Albertosaurus, an apex predator related to Tyrannosaurus rex that inhabited Alberta during the Late Cretaceous period. The Albertosaurus specimen, consisting of scattered skull fragments, was found north of Drumheller in Alberta’s badlands in 2022. Doyon's study, supervised by University of Alberta professor Philip Currie, suggests that an eight-year-old Albertosaurus died of unknown causes and was subsequently fed upon by a dromaeosaurid, or raptor. The bite marks showed no signs of healing, indicating they were made around the time of the Albertosaurus's death or shortly thereafter, consistent with feeding or scavenging behavior. This finding offers a rare glimpse into the feeding habits and ecological interactions of dinosaurs millions of ye...

University of Alberta Research Reveals Raptor Fed on Larger Albertosaurus

University of Alberta Research Reveals Raptor Fed on Larger Albertosaurus

Researchers at the University of Alberta have uncovered evidence suggesting that a raptor, a smaller carnivorous dinosaur, fed on a larger Albertosaurus. This discovery stems from bite marks found on the jawbone of an eight-year-old sub-adult Albertosaurus, a relative of Tyrannosaurus rex, which roamed Alberta approximately 70 million years ago. Joshua Doyon, a master's student in paleontology at the University of Alberta, led the research into these bite marks. By analyzing the spacing of the marks and comparing them to the teeth of other carnivorous dinosaurs from the same period, researchers concluded that a raptor was the most probable culprit. An alternative, though less likely, hypothesis considered was that a much younger member of the Albertosaurus species, less than two years old and about two meters long, cannibalized the larger dinosaur. This finding offers rare insight into the feeding interactions between carnivorous dinosaurs, particularly the instance of one carnivore consuming another, rath...

University of Alberta Researchers Discover Raptors Preying on Tyrannosaurs, Revealing New Dinosaur Dietary Behaviors

University of Alberta Researchers Discover Raptors Preying on Tyrannosaurs, Revealing New Dinosaur Dietary Behaviors

Researchers at the University of Alberta have made a significant discovery regarding dinosaur dietary habits, identifying the first evidence of raptors preying on tyrannosaurs. This finding stems from the analysis of a fossilized lower jaw of an Albertosaurus, a type of tyrannosaur, which exhibited three distinct tooth marks. The fossil was initially found by a member of the public in 2022 and subsequently examined by technicians at the Royal Tyrrell Museum before being sent to the University of Alberta. Joshua Doyon, the lead researcher and a master’s student, along with his supervisors, spent four years studying the specimen. They concluded that the bite marks were inflicted by another carnivore, most likely a raptor. This discovery is considered rare, as finding evidence of meat-eating dinosaur teeth on other meat-eating dinosaurs is uncommon. The Albertosaurus lived in the late Cretaceous period, approximately 67 to 73 million years ago, in the region that is now Alberta.

Raptor Scavenging on Tyrannosaur Discovered in Alberta, Revealing Complex Dinosaur Food Web

Raptor Scavenging on Tyrannosaur Discovered in Alberta, Revealing Complex Dinosaur Food Web

A new study published in the Journal of Paleontology presents the first evidence of a dromaeosaurid, or 'raptor,' feeding or scavenging on a tyrannosaur. Paleontology master's student Joshua Doyon's research on an 8-year-old Albertosaurus, a cousin of Tyrannosaurus rex, found near Drumheller, Alberta, suggests that the tyrannosaur died of unknown causes and subsequently became a meal for a much smaller raptor. This finding challenges previous assumptions about the dinosaur food web, indicating a more complex ecological interaction where smaller predators could scavenge on apex predators. An alternative, less likely hypothesis, also considered, is that the bite marks were the result of cannibalism by a baby Albertosaurus on a larger subadult.

Tyrannosaurus Rex Social Behavior Revealed Through Fossil Evidence

Tyrannosaurus Rex Social Behavior Revealed Through Fossil Evidence

New fossil evidence is shedding light on the social behavior of Tyrannosaurus rex, suggesting a more complex social life than previously thought. While T. rex often walked alone, as indicated by sparse track records and single skeletons, trace fossils like bite marks on bones reveal significant social interactions. Approximately half of all large tyrannosaur skulls show healed puncture wounds, indicating that T. rex and related dinosaurs frequently engaged in face-biting. These wounds suggest conflicts, possibly over carcasses or territory, where their powerful jaws were the primary weapons. Despite the ferocity of these encounters, the presence of healed bones indicates that T. rex often survived, though likely enduring painful injuries.

Spinosaurus Identified as Largest Carnivorous Dinosaur, Exceeding T. Rex in Size

Spinosaurus Identified as Largest Carnivorous Dinosaur, Exceeding T. Rex in Size

Spinosaurus is currently recognized as the largest known carnivorous dinosaur, surpassing the Tyrannosaurus rex in size. Recent findings and studies indicate that Spinosaurus could reach lengths of 41-59 feet and weigh over 20 tons. This theropod dinosaur, which lived in what is now North Africa during the Cretaceous period (approximately 112 to 97 million years ago), was semi-aquatic. Its distinctive features included neural spines up to 5.4 feet long, likely forming a sail-like structure, and a narrow, nearly 6-foot skull with elongated jaws and conical, unserrated teeth, indicative of a piscivorous diet. Isotope analysis of its teeth further supports a semi-aquatic lifestyle, suggesting it was a generalized and opportunistic predator with a bias towards fishing. The original fossil evidence of S. aegyptiacus was destroyed in WWII, but more recently, abundant Spinosaurus fossils have been discovered in the Kem Kem Beds of Morocco.

Fossilized Skin Fragments from China Reveal Early Ecdysozoan Diversity

Fossilized Skin Fragments from China Reveal Early Ecdysozoan Diversity

A new study published in the Journal of Micropalaeontology details the discovery of tiny fossilized skin and cuticle fragments from the lower Cambrian Yanjiahe Formation in southern China. These microfossils, dating back approximately 535 million years, provide an intimate glimpse into the early evolution of ecdysozoans, a group that includes insects, crabs, and roundworms. Researchers, led by Lei Zhang of Chengdu University of Technology, extracted these fragments from phosphatic dolostone, revealing six distinct forms representing at least four ecdysozoan taxa. The preservation style, known as Orsten-type, allowed for three-dimensional replication of delicate cuticular surfaces down to subcellular scales. The findings indicate that these early ecdysozoans were already experimenting with diverse body plans, including sac-like forms, vermiform worms, and appendage-bearing panarthropods, during the initial phase of the Cambrian explosion. The presence of spines and sclerites suggests their adaptive importan...

Oxford Study Suggests Animal Origins May Predate Current Fossil Record by 200 Million Years

Oxford Study Suggests Animal Origins May Predate Current Fossil Record by 200 Million Years

New research from the University of Oxford, published in Science Advances, indicates that animal life on Earth may have originated between 700 million and 800 million years ago, pushing back their estimated appearance by as much as 200 million years. This challenges traditional reliance on fossil evidence, which places the oldest unambiguous animal fossils around 574 million years ago, just before the Cambrian Period. The study re-evaluated the significance of fossil absence in well-preserved geological formations, such as the Weng’an Biota in China (590 million years old) and the Kheseen Biota in Mongolia (over 40 million years younger than Weng’an). Despite exceptional preservation conditions in these sites, no definitive animal fossils were found, suggesting that fossilization conditions might not always capture the presence of early, soft-bodied animals. By incorporating the ages of even older formations, like Norway’s Svanbergfjellet Formation and Arizona’s Chuar Group (850 to 730 million years old), ...

520-Million-Year-Old Fossilized Larva Discovered with Intact Brain and Nervous System

520-Million-Year-Old Fossilized Larva Discovered with Intact Brain and Nervous System

Paleontologists have unearthed a 520-million-year-old fossilized larva from the Cambrian period, remarkably preserving its internal organs, including a brain and digestive tract. This discovery challenges previous assumptions about the fossilization of soft-bodied organisms, as such delicate tissues typically decompose before mineralization can occur. Lead researcher Martin Smith expressed surprise at the level of detail maintained over half a billion years. The specimen, an ancient ancestor of arthropods like insects, crabs, and lobsters, offers a rare glimpse into the early organization of life during the Cambrian Explosion. Advanced imaging technology, specifically synchrotron X-ray tomography, was used to create 3D reconstructions of the larva, revealing a preserved brain, digestive glands, a primitive circulatory system, and nerve fibers connected to its limbs and eyes. Co-author Katherine Dobson highlighted the almost perfect preservation achieved through natural fossilization.

Scientists Discover Smallest Archaeal Genome, Naming it Candidatus Sukunaarchaeum mirabile

Scientists Discover Smallest Archaeal Genome, Naming it Candidatus Sukunaarchaeum mirabile

An international team of researchers, including scientists from the University of Nottingham and the University of Tsukuba in Japan, has identified a new microorganism, Candidatus Sukunaarchaeum mirabile (Sukunaarchaeum), which possesses the smallest genome among all known archaea. Published in the journal Current Biology, the study reveals that Sukunaarchaeum's genome contains only 189 protein-coding genes, less than half the size of the previously smallest known archaeal genome. Despite this minimal genetic makeup, it retains essential genes for DNA replication and protein synthesis. The microorganism was discovered through the analysis of genetic material from individual marine plankton. Approximately a quarter of its genome is dedicated to unusually large membrane proteins whose functions are yet to be determined. Researchers hypothesize that Sukunaarchaeum may exist as a parasite, either within or alongside another organism, given that similar proteins have been observed in other parasitic archaea. Ho...

Singularity Expert Robert Suarez Highlights Biology as the Largest Dataset for Innovation

Singularity Expert Robert Suarez Highlights Biology as the Largest Dataset for Innovation

Robert Suarez, a Singularity expert, emphasizes that biology represents the largest dataset ever, containing four billion years of evolutionary experimentation. This perspective is detailed in the report 'Living Tech: The Convergence of Biology and Innovation.' Advances in biotechnology, including genome sequencing, gene expression monitoring, neural mapping, and cellular tracking, are transforming the living world into analyzable information for computers. This shift allows for a deeper understanding of biological systems that were previously inaccessible through direct observation. The ability to computationally analyze biological processes, exemplified by tools like Google DeepMind's AlphaFold, which predicts protein structures with extraordinary speed, is revolutionizing how researchers approach innovation. Instead of merely observing nature, scientists can now use computational tools to narrow down research fields, identify patterns, and guide investigations, effectively searching nature's vast knowle...

Otter-like critter swam lakes and rivers in the age of dinosaurs

Otter-like critter swam lakes and rivers in the age of dinosaurs

By Will Dunham Oct 8 (Reuters) - About 165 million years ago, a furry critter that swam like a platypus, hunted like an otter and had a tail similar to a beaver's frolicked in the lakes and rivers of what is now China pursuing fish and salamanders, the oldest-known example of a semiaquatic lifestyle