The Perfect Swarm: Footprint Reading Library 3000

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Language(s): American English

Level(s): High-intermediate, C1

Authors : National Geographic; Rob Waring

9781424012275

48 Pages  Paperback 

1st Edition

©2010, Published

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Overview

In the 1800s, the Rocky Mountain locust brought massive destruction to Western settlers. Then, the insects suddenly disappeared-almost without a trace. Now scientists hope to find a reason for the locust's extinction. What caused the Rocky Mountain locust to disappear? Where will the scientists find ...more

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