The Devonian nekton revolution

Glyptolepis from the Middle Devonian of Scotland

The Rhipidistia (Osteichthyes, Crossopterygii) comprise three superfamilies of Paleozoic fossil fishes, the Holoptychoidea, Osteolepoidea and Rhizodontoidea. Of these the members of the Holoptychoidea (families Holoptychidae and Porolepidae) are by far the least well known, and consequently there exists a considerable gap in our knowledge of the evolution of the Rhipidistia as a whole. The aim ...

the u.s. policy in central asia and its impact on the colored revolutions in the region (the case study of tulip revolution in kyrgyzstan)

چکیده ندارد.

The Reapportionment Revolution Reexamining the Consequences of the Reapportionment Revolution

1 Introduction 3 elbridge gerry's salamander The word gerrymander describes a distinctively (albeit not uniquely) American practice, that of redrawing district lines to achieve partisan (or other) advantage. The word also has a distinctively American etymology, dating back to Elbridge Gerry's term as governor of Massachusetts (1810–1812), when political observers made sport of a district drawn ...

Revolution

After the establishment of written language, the most revolutionary development in human communication was the invention of the printing press in the 15 th century (1). Before then, books were handwritten, rare, and expensive. Medieval monasteries supported the transcription of new manuscripts from existing ones, and errors were common because of spelling, handwriting, and abbreviation idiosync...

The Agricultural Revolution