All articles tagged with #fossil evidence
New research suggests dinosaurs split ecologically by life stage: juveniles rapidly left parental care, forming age-based groups with different diets and habitats than adults, effectively creating distinct functional roles within the same ecosystem and reshaping estimates of Mesozoic diversity.
New data from Denmark confirm that some ammonite populations survived the Cretaceous–Paleogene boundary, with evidence suggesting both survival and redeposition depending on the microfacies and stratigraphic context, supporting the hypothesis that certain ammonites persisted into the Danian period.
New research suggests that dinosaurs had a different parenting style from mammals, with juvenile dinosaurs becoming independent quickly and occupying distinct ecological niches, which may have led to greater ecological diversity in the Mesozoic era than previously thought.
Recent research has revealed that the small predator previously thought to be a juvenile T. rex is actually a fully grown Nanotyrannus lancensis, rewriting the understanding of dinosaur growth, evolution, and ecosystem dynamics during the Late Cretaceous period, and introducing a new species, Nanotyrannus lethaeus.
A new study reveals that primates originated in cold, arid environments rather than tropical forests, challenging long-held beliefs and highlighting the importance of climate in primate evolution and conservation efforts.
Male ghost sharks have a unique forehead structure called a tenaculum covered with true teeth, which helps in mating. This discovery, supported by fossil, genetic, and modern specimen analysis, reveals that these teeth are genuine and develop outside the mouth, showcasing evolutionary flexibility and adaptation in deep-sea fish.
Fossil analysis suggests that ancestors of modern flightless birds like ostriches and rheas could fly long distances, indicating they may have migrated across oceans before evolving into flightless species through convergent evolution, especially in predator-free island environments.
A 140,000-year-old fossil from Skhul Cave provides the earliest evidence of interbreeding between Neanderthals and Homo sapiens, showing a mix of traits and indicating social and biological relations between the two groups in the Land of Israel.
Research reveals that 120 million years ago, dinosaurs thrived in polar regions of Antarctica and southern Australia, adapting to long periods of darkness and cold, supported by complex ecosystems including rainforests and river systems, challenging the notion that polar areas were inhospitable during the age of dinosaurs.
Fossil and statistical modeling research shows that early primates evolved in cold, seasonal climates in North America around 66 million years ago, challenging the previous belief that they originated in tropical forests, and suggesting they migrated to warmer environments over time.
A study reveals that volcanic CO2 emissions caused rapid ocean acidification during the Triassic-Jurassic extinction 201 million years ago, leading to the decimation of marine life, and warns that current human activities could trigger similar or worse impacts on today's oceans.
A recent study suggests the Cambrian Explosion, traditionally dated to around 530 million years ago, may have actually begun as early as 545 million years ago, based on analysis of ancient trace fossils indicating more complex and mobile early organisms than previously believed.
A fossilized gut content of a 94-101 million-year-old sauropod dinosaur revealed that these herbivores primarily relied on gut microbes for digestion, consumed a variety of plants including conifers, seed ferns, and flowering plants, and engaged in minimal oral processing, supporting the idea of bulk feeding. This discovery provides rare direct evidence of sauropod diet and suggests they were indiscriminate feeders that adapted to eating flowering plants shortly after their appearance.
New research suggests dinosaurs had soft tissue structures called 'exoparia' that functioned like cheeks, indicating they may have chewed their food more mammal-like than previously thought, challenging traditional views of dinosaur anatomy.
A new study in Nature Communications reveals that Neanderthals experienced a severe genetic bottleneck after an initial period of diversity, likely caused by climate change, which contributed to their eventual extinction around 40,000 years ago. The research challenges previous assumptions about their gradual decline and highlights the complex, fragmented nature of human evolution.