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United States The  United States of America  ( USA ), commonly known as the  United States ( U.S. ) or  America , is a  federal republic  composed of 50  states , a  federal district , five major  self-governing territories , and  various possessions . [fn 6]  At 3.8 million square miles (9.8 million km 2 ) and with over 325 million people, the United States is the world's  third- or fourth-largest country by total area [fn 7]  and the  third-most populous country . The capital is  Washington, D.C. , and the  largest city by population ...... s ee more>>>>>

Nile    The  Nile  ( Arabic :  النيل ‎,  Egyptian Arabic   en-Nīl ,  Standard Arabic   an-Nīl ;  Coptic :  ⲫⲓⲁⲣⲱ ,  P(h)iaro ;  Ancient Egyptian :  Ḥ'pī  and  Jtrw ;  Biblical Hebrew :  הַיְאוֹר ‬,  Ha-Ye'or  or  הַשִׁיחוֹר ‬,  Ha-Shiḥor ) is a major north-flowing  river  in  northeastern Africa , and is commonly regarded as the  longest river  in the world, [1]  though some sources cite the  Amazon River  as the...... see more>>>>  

Amazon rainforest The  Amazon rainforest  ( Portuguese :  Floresta Amazônica  or  Amazônia ;  Spanish :  Selva Amazónica ,  Amazonía  or usually  Amazonia ;  French :  Forêt amazonienne ;  Dutch :  Amazoneregenwoud ), also known in English............. see more>>>>