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ISTANBUL
The largest city in Turkey and the industrial, commercial, an cultural center of the country. Formerly called Constantinople, the city was the capital of two great empires, the Byzantine and the Ottom More
Memory
An average brain weighs just three pounds. But this complex organ contains up to 100-billion neurons. It would take you about 171 years to count them all! Each of these tiny cells helps build importan More
JOSIAH WILLARD GIBBS
The foremost American mathematician and physicist of his day and a pioneer in the development of chemical thermodynamics. He was born Feb. n, 1839, in New Haven, Conn., where his father, a well-known  More