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Many specimens of early Eskimo sketch maps on skin, wood, and bone have been found.
Until this time, there were no specimens of early Homo on record that were more primitive than H. erectus.
As a result of the imperfect preservation of the fossil record, most specimens of early Homo are teeth, jaws, and skull fragments, the anatomy of which cannot directly or easily speak to bipedalism or brain size.
Seventy seven specimens of early spider orchids from herbariums, covering a 111-year period from 1848 to 1958, were compared with field observations of the species collected between 1975 and 2006.
To further explore the evolutionary roots of terrestrial vertebrate hearing, paleobiologists Johannes Müller and Linda Tsuji of Humboldt University in Berlin, Germany, examined several dozen specimens of early reptiles that have been found since the 1930s in the Mezen River Basin of central Russia.
But the past decade or two of research, which is marked by the discovery of thousands of specimens of early birds and flying dinosaurs, also shows that feathers were an early evolutionary innovation even if they probably arose for reasons unrelated to powered flight, such as insulation or sexual display.
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More than 16,000 specimens of the eight study species were sampled in the field between 2007 and 2009, and their current geographic ranges were compared with those of more than 73,000 specimens of earlier collections stored in museums.
Comparatively few collections of the various species and the poor state of preservation of key reference specimens of earlier documented species hamper comparison and reliable identification (Parnell 2001; Parnell et al. 2014).
We at first examined the expression level of IGF-1R in surgical specimens of early-stage cervical cancer by IF staining.
The authors therefore conclude that urinary total hydroxyproline, measured as the ratio hydroxyproline/creatinine in a fresh specimen of early-morning urine, is the best index of collagen breakdown in metastatic bone disease and preferable to measurement of free serum hydroxyproline.
The John and Carolyn Grossman Collection of chromolithography, housed at the Winterthur Museum in Delaware, includes 250,000 specimens of this early and often exquisite form of color printing — the high-definition medium of its day.
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