Cerebral arterial anatomy and morphology encompass the design and arrangement of the arterial networks supplying the brain. This complex system is critical in ensuring that oxygenated blood reaches ...

The genus Laretia Gillies & Hook, comprises a single species, L. acaulis (Cav.) Gillies & Hook., of xerophilous subshrubs that form flat compact cushions. It is endemic to southern South America and ...

The freshwater unionoid mussel Popenaias popeii is restricted to river drainages of the Gulf of Mexico in southwestern North America. Previously, this species has been classified as both a short-term ...

Introduction: Seeing and knowing -- Ancient snakes, modern snakes: "what is a snake?" -- Ancient snake lizards: the fossil record -- The anatomy of ancient snake lizards -- Ancient snake lizard ...

The study of thin sections, peels, and SEM micrographs of skeletons, and sections of skeletons and soft parts together, has revealed new morphology and anatomy resulting in new growth and functional ...

Remarkable details have been uncovered from dinosaur mummies discovered a century ago in the Wyoming badlands. These rare ...

For centuries, scientists have wondered: Where is the head of a starfish? Researchers mapped starfish genes to solve the mystery, and it wasn't what they expected. Turns out, starfish genes suggest it ...

Researchers have painstakingly taken computed topography (CT) scans of more than 13,000 individual specimens to create 3D images of more than half of all the world's animal groups, including mammals, ...

Filling in the links of the evolutionary chain with a fossil record of a ‘‘snake with four legs” connecting lizards and early snakes would be a dream come true for paleontologists. But a specimen ...

A common, economic, and easy method of administering drugs is orally, by swallowing a pill or capsule. But oral administration is the most complex way for the human body to absorb an active ...