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The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Like most world-changing inventions, the printing press of fifteenth-century Europe took advantage o
New Yorkers flee from the dust caused by the collapse of the twin towers of the World Trade Center f
A visually impaired patient is assisted by a service dog.
Permian world
Thanks to agricultural advances, the world’s farmers can grow plenty of food