Weekly Insights for Thinkers

Synapsids & Mammals

This group includes the ancestors of mammals and lived alongside reptiles for millions of years. They eventually died out, except for the lineage that led to mammals.

Appendix

The appendix is a small, finger-shaped pouch attached to the large intestine. It has long been considered a vestigial organ, meaning that it has no function in the human body. However, recent research suggests that the appendix may actually serve as a reservoir for beneficial gut bacteria. The appendix is an example of a Phenotype

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© N. Tamura (CC BY-SA)

Purgatorius — Earliest known proto-primate.

Within mammals, only primates have binocular vision, grasping hands, and flat nails–instead of claws. Purgatorius might have had all three earning it the earliest known proto-primate label. It lived in Eastern Montana about 66 million years ago during the very last years of the Cretaceous period. It lived through the K-T extinction event and the extinction

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