A maturing mouse gut nervous system (shown in orange), a mesh-like system of neurons that regulates digestion and gastrointenstial function, runs from the stomach through the intestines.
Rorqual whales have unusually stretchy neurons in their mouths and tongues that allow the animals to feed by filtering gulps of water greater than the volumes of their bodies.
The first application of Snap-tagging to neurons in the skin of living mice reveals “baskets” of nerve endings (red) surrounding the base of each hair (thick blue line).