Related topics: protein · dinosaurs · archaeologists

The mother of all lizards found in Italian Alps

Scientists said Wednesday they had tracked down the oldest known lizard, a tiny creature that lived about 240 million years ago when Earth had a single continent and dinosaurs were brand new.

New fossils show ancient comb jellies had skeleton parts

(Phys.org)—A team of researchers with members from several institutions in China and one in the U.S. has found evidence that shows that ancient comb jellies had skeleton parts. In their paper published in the journal Science ...

3,200-year-old skeleton found with cancer

Archaeologists have found the 3,200-year-old skeleton of a man with a spreading form of cancer, the oldest example so far of a disease often associated with modern lifestyles, scientists said Monday.

Pompeii-style volcano gave China its dinosaur trove

A treasure trove of fossilised dinosaurs and other long-extinct species in northeastern China was created, Pompeii-style, by an erupting volcano, scientists said Tuesday.

Researchers find earliest use of flowers in burial rite

(Phys.org) —An international team of researchers working at Mount Carmel, Israel has found evidence of the use of flowers by ancient people in burial rites. In their paper published in the journal Proceedings of the National ...

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Skeleton

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.

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