The Ordovician Period stands as a critical chapter in Earth's geological history, with carbon isotope records serving as both ...

Definitively dating the age of a clutch of fossil dinosaur eggs at a famous site in China may let scientists link eggshell features to environmental shifts at the time.

The explosion of animal life in Earth's oceans half a billion years ago during and after the Cambrian Period is commonly ...

https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!97386~!0#focus ...