Scientists have been able to reconstruct, for the first time, the intricate three-dimensional structure of the backbone of early tetrapods, the earliest four-legged animals. High-energy X-rays and a new data extraction protocol ...
Archaeology
Jan 13, 2013
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Somites, precursors for the segmental structures such as the vertebral column, ribs and skeletal muscles, form periodically by segmentation of the rostral parts of the presomitic mesoderm (PSM). This periodic event is regulated ...
Cell & Microbiology
Jan 9, 2013
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(Phys.org)—From a single-cell egg to a fully functional body: as embryos develop and grow, they must form organs that are in proportion to the overall size of the embryo. The exact mechanism underlying this fundamental ...
Cell & Microbiology
Dec 20, 2012
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The research of Chinese pterosaurs has made remarkable contributions to the study of those flying reptiles. Most specimens were unearthed from the Yixian and Jiufotang formations of western Liaoning, China. More recently, ...
Archaeology
Mar 2, 2012
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(PhysOrg.com) -- A new species of parrot-sized dinosaur, the first discovered with only one finger, has been unearthed in Inner Mongolia, China.
Archaeology
Jan 24, 2011
20
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(PhysOrg.com) -- By examining the development of bones in the vertebral column, limbs, and ribcage, scientists at the University of Cambridge have discovered how sloths evolved their unique neck skeleton.
Plants & Animals
Oct 18, 2010
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