Science Daily - Dinosaurs

The fossilized neck bone of a flying reptile unearthed in Canada shows tell-tale signs of being bitten by a crocodile-like creature 76 million years ago, according to a new study.

Previous studies have posited that the mass extinction that wiped the dinosaurs off the face of the Earth was caused by the release of large volumes of sulfur from rocks within the Chicxulub impact crater 66 million years ago. A new study questions this scenario. Using groundbreaking empirical measurements of sulfur within the related Cretaceous-Paleogene (K-Pg) boundary layer, the international team has demonstrated that the role of sulfur during the extinction has been overestimated.

Prehistoric kangaroos in southern Australia had a more general diet than previously assumed, giving rise to new ideas about their survival and resilience to climate change, and the final extinction of the megafauna, a new study has found. The new research used advanced dental analysis techniques to study microscopic wear patterns on fossilized kangaroo teeth.

Sabre-toothed predators -- best know from the infamous Smilodon -- evolved multiple times across different mammal groups. A new study reveals why: these teeth were 'functionally optimal' and highly effective at puncturing prey.

Evolution has resulted in the development of both herbivores and carnivores -- but how? What type of food did extinct vertebrates eat? And how can we gain insight into the diets of these creatures? In living animals, we can simply observe what they feed on today. In the case of extinct species, however, researchers rely on morphological or chemical information supplied by fossils. A team has now compiled a reference framework of isotope compositions indicating the type of diet for extant reptiles that represents a useful reference dataset to reconstruct the diet of fossil reptiles.

A newly described dinosaur whose fossils were recently uncovered is challenging the existing narrative, with evidence that the reptiles were present in the northern hemisphere millions of years earlier than previously known.

Scientists have successfully identified a previously unknown species to Southern California from fossilized seeds, revealing a drought-fueled dance between two species of juniper with lessons for the region's climate future.

While volcanism caused a temporary cold period, the effects had already worn off thousands of years before the meteorite, the ultimate cause of the dinosaur extinction event, impacted.

Scientists have discovered the oldest known animal with saber teeth: a predator that lived 270 million years ago. This animal, from before the age of the dinosaurs, was a dog-like creature that was related to the ancestors of mammals.

A new study sheds light on the lives of people who lived over 5,600 years ago near Kosenivka, Ukraine. Researchers present the first detailed bioarchaeological analyses of human diets from this area and provide estimations on the causes of death of the individuals found at this site.

Research has revealed that several groups of meat-eating dinosaur stalked the Bexhill-on-Sea region of coastal East Sussex 135 million years ago.

A research team has made exceptional discoveries on prehistoric archery from the early Neolithic period, 7,000 years ago. The well organic preservation of the remains of the Cave of Los Murcielagos in Albunol, Granada, made it possible for scientists to identify the oldest bowstrings in Europe, which were made from the tendons of three animal species. The use of olive and reed wood and birch bark pitch in the making of arrows reveals an unprecedented degree of precision and technical mastery, as highlighted in the study. The discoveries redefine the limits of our knowledge about the earliest agricultural societies in Europe and provide a unique view on ancestral archery materials and practices.

More than a million years ago, on a hot savannah teeming with wildlife near the shore of what would someday become Lake Turkana in Kenya, two completely different species of hominins may have passed each other as they scavenged for food. Scientists know this because they have examined 1.5-million-year-old fossils they unearthed and have concluded they represent the first example of two sets of hominin footprints made about the same time on an ancient lake shore. The discovery will provide more insight into human evolution and how species cooperated and competed with one another, the scientists said.

Paleoindians at Wyoming's LaPrele mammoth site made needles from the bones of fur-bearers, likely to creat garments from the animals' furs to keep warm in a cool climate.

Researchers have been able to identify undigested food remains, plants and prey in the fossilized feces of dinosaurs. These analyses of hundreds of samples provide clues about the role dinosaurs played in the ecosystem around 200 million years ago.

Scientists have presented results on the acoustic characteristics of a physical model of the Parasaurolophus' crest. They created a physical setup made of tubes to represent a mathematical model that will allow researchers to discover what was happening acoustically inside the crest. The physical model, inspired by resonance chambers, was suspended by cotton threads and excited by a small speaker, and a microphone was used to collect frequency data.

Wings may be the obvious choice when studying the connection between dinosaurs and birds, but a pair of paleontologists prefer drumsticks. That part of the leg, they say, is where fibular reduction among some dinosaurs tens of millions of years ago helped make it possible for peacocks to strut, penguins to waddle, and turkeys to trot.

A 'one of a kind' fossil discovery could transform our understanding of how the unique brains and intelligence of modern birds evolved, one of the most enduring mysteries of vertebrate evolution.

Extraordinarily well preserved fossils of feathered dinosaurs and other creatures got that way after being frozen in time by by volcanic eruptions, researchers have long suggested. Not so fast, says a new study.

The new mammal lived in Colorado 70 to 75 million years ago -- a time when a vast inland sea covered large portions of the state, and animals like sharks, turtles and giant crocodiles abounded.