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Rainbow trout is non- native to the united states. however this species is breeding with the native gula yltrout acientistrecently observed that the hola trout were becoming exitinct what is the cause of their extinction

Wegeners theory of continental drift states that the continents have changed throughout history while the theory of plate tectonics

Name the two rivers that run through the fertile crescent. how were the rivers both positive and negative to societies of the fertile crescent?