Dinosaur eggshells are turning out to be time capsules—finally giving scientists a direct way to date the age of dinosaurs...
Researchers have found that fossilized dinosaur eggshells contain a natural clock that can reveal when dinosaurs lived. The technique delivers surprisingly precise ages and could revolutionize how fossil sites around the world are dated.
https://www.sciencedaily.com/images/1200/newly-hatched-troodontid-like-dinosaur.webp
^^^
Theropod chick !
Artistic reconstruction of a newly hatched troodontid dinosaur [ 11DuckHunt moment ] peacefully resting among fragments of its eggshell (loosely based on Mongolian microtroodontid-type). These eggshells, when buried within ancient soil, interacted with meteoric waters, leading to early uranium incorporation into the eggshell calcite crystals. Credit: Eva Utsukiyouhei (宇津城遥平)