Stem mammaliaforms (also known as 'stem mammals') are long-extinct relatives to the extant mammals (crown Mammalia). Docodonts are such a lineage of stem mammaliaforms. Their morphologies provide ...

But after our adult teeth grow in, the stem cells die and disappear. To understand why, let's take a journey back in time. To about 320 million years ago, when mammals and reptiles split off.

Explore the fascinating process of python digestion and how these reptiles regenerate their intestines after every meal.

Using CRISPR-based engineering methods to prompt stem cells to organize into embryo-like structures, scientists were able to create 'programmable' cellular models of embryos without ever experimenting ...

The (a) intestine, (b) esophagus and (c) stomach are shown. Quiescent stem cells (d) through asymmetric division probably give rise to more rapidly dividing active stem cells, which then produce ...