Related topics: protein · dinosaurs · archaeologists

T-rex skeleton could fetch record price at New York auction

The skeleton of a 40-foot (12-meter) dinosaur nicknamed "Stan", one of the most complete Tyrannosaurus rex specimens ever found, will be auctioned in New York next month and could set a record for a sale of its kind.

Big-boned marsupial unearths evolution of wombat burrowing behavior

The discovery of a new species of ancient marsupial, named Mukupirna nambensis, is reported this week in Scientific Reports. The anatomical features of the specimen, which represents one of the oldest known Australian marsupials ...

Using digital twins to design more sustainable cities

For Dr. Fabian Dembski, who works at the intersection of architecture, city planning, and computational science, cities are more than just the places we live. They function like living organisms, growing and changing over ...

page 1 from 36


In biology, a skeleton is a rigid framework that provides protection and structure in many types of animal, particularly those of the phylum Chordata and of the superphylum Ecdysozoa. Exoskeletons are external, as is typical of many invertebrates; they enclose the soft tissues and organs of the body. Exoskeletons may undergo periodic moulting as the animal grows. Endoskeletons are internal, as is typical of many vertebrates; they are usually surrounded by skin and musculature, though they often enclose vital organs. Endoskeletons are attachment points for musculature and act as leverage for movement, and in many animals contain marrow, which produces blood cells. Skeletons may or may not be mineralized - human skeletons are calcified, while shark skeletons are cartilaginous - and may be jointed for flexibility and motility or rigid for structural strength.

The average adult human skeleton has around 206 bones. These bones meet at joints, the majority of which are freely movable. The skeleton also contains cartilage for elasticity. Ligaments are strong strips of fibrous connective tissue that hold bones together at joints, thereby stabilizing the skeleton during movement.

This text uses material from Wikipedia, licensed under CC BY-SA