Krusatodon kirtlingtonensis, a precursor to mammals, lived longer and grew slower compared to modern mammals, offering insights into mammalian success and unique biology.
Fossils found on the Isle of Skye of a juvenile and adult Krusatodon kirtlingtonensis provide unprecedented opportunities to study growth rates and age at death, with implications for mammalian evolution.
X-ray scanning of the fossils and analysis of growth rings in teeth revealed that the juvenile Krusatodon kirtlingtonensis lived between seven months and two years, while the adult lived approximately seven years, supporting the idea that early mammals lived longer than modern counterparts.
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