Dinosaurs

Researchers have described a previously unknown sauropod dinosaur from fossils found in Argentina's Chubut province. The creature, called Bicharracosaurus dionidei, reached about 20 meters in length and lived around 155 million years ago.

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A 75-million-year-old fossilized foot bone from Montana shows bite marks from a smaller tyrannosaur feeding on a much larger relative. Researchers used 3D scans to document this evidence of scavenging behavior. The finding, published this year, highlights opportunistic feeding among these ancient predators.

A study of rare fossils reveals that Anchiornis, a feathered dinosaur from 160 million years ago, likely could not fly due to irregular molting patterns in its wing feathers. Researchers led by Dr. Yosef Kiat from Tel Aviv University analyzed nine well-preserved specimens from eastern China. The findings, published in Communications Biology, suggest flight evolution in dinosaurs was more complex than previously thought.

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New research suggests that young dinosaurs became independent quickly, forming their own groups and occupying different ecological niches from their parents, unlike mammals with extended parental care. This distinction could reshape understandings of Mesozoic ecosystems. The study, led by Thomas R. Holtz Jr. from the University of Maryland, was published in the Italian Journal of Geosciences.