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Silica transforms through solid-state processes

We compared fossil sponge spicules up to 150 million years old with modern specimens. Using scanning electron microscopy and mineralogical analyses, we found that their silica gradually transforms from an amorphous state to quartz through solid-state processes,

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Science News

Giant predators in a tropical Cretaceous sea

The Paja Formation (Colombia) preserves an exceptional fossil record of a tropical sea 120 million years old. Findings include pliosaurs over 10 metres long, large elasmosaurs, specialized ichthyosaurs, marine turtles, fishes, ammonites, early crabs, dinosaurs, and more.

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Science News

Triassic lungfish from Frick

Lungfish were common in Late Triassic freshwater ecosystems but remain surprisingly understudied. New fossils from Frick (Switzerland), a locality that has also previously yielded remains of dinosaurs, allow for the first description of lungfish material from this site.

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Science News

The end of the Dinosaur Age in eastern Poland

From 27 to 29 May 2026, the 90th Scientific Meeting of the Polish Geological Society was held in Lublin, co-organized by the Institute of Paleobiology of the Polish Academy of Sciences.

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Science News

Two new Triassic turtles from Greenland

Turtles appeared in the Triassic and quickly attained global distribution. Yet, until recently, their early diversity was poorly recognized. The paper presents two new genera and species of Triassic turtles from Greenland established based on material collected in the late 20th century.

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Map of Denmark with the location of the studied sites and an illustration of an ammonite with explanations of morphological terms
Science News

Species concept in palaeontology

Principles of species identification in fossil material are a fundamental problem in palaeontology. This paper illustrates the issue through a taxonomic analysis of a collection of ammonites of the Pachydiscus neubergicus group from the Maastrichtian chalk of Denmark.

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