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Over nearly 30 years, humans removed many polar bears for a variety of reasons, from a population in
During drought years on the Galapagos, small, easily eaten seeds become rare, le
Figure 7.1 shows the rapid decline in the trust of Americans in government since the 1960s. This de
The main avenue to the upward social mobility reviewed in the text has been higher education.
Top Prescriptions for Children Under 17 Years of Age (2002–2010)
Climate change is an important vector for human diseases