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The United States , far from declining in importance following the ending of the Cold War , is now the world 's only superpower . Amazon is dabbling in text mining , via a feature called Statistically Improbable Phrases ( SIP ) . In Ethiopia ’ s Somali region , thousands of people have already started migrating in search of food and water for themselves and for their livestock . Using this virtual classroom , students in grades 4 , 5 , 6 are tackling three Design Challenges associated with Living and Working in Space . In summary , the 2002/03 projects involved 34 investigators of all genera ; studies of speciation at and diffusion to the root surface ( Van Rees ) , conditional stability constants for metal binding to roots ( Hale ) will contribute to the advancement of the Biotic Ligand Model for plants , resulting in soil criteria for metals that include bioaccumulation .