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Blastoid

Blastoids are an extinct type of stemmed echinoderm, often referred to as sea buds. They first appear, along with many other echinoderm classes, in the Ordovician period, and reached their greatest diversity in the Mississippian subperiod of the Carboniferous period. However, blastoids may have originated in the Cambrian. Blastoids persisted until their extinction at the

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University of Sheffield

The University of Sheffield is a public research university in Sheffield, South Yorkshire, England. Its history traces back to the foundation of Sheffield Medical School in 1828, Firth College in 1879 and Sheffield Technical School in 1884. University College of Sheffield was subsequently formed by the amalgamation of the three institutions in 1897 and was

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