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In Nebraska, Oligocene and Miocene beavers lived in soil features called
Q7: _ are sediments consisting of nearly spherical
Q10: A powerful greenhouse gas that could be
Q10: The single largest mass extinction in Earth's
Q15: The first negative feedback from global warming
Q19: The onset of the Younger Dryas (about
Q23: A sudden pulse toward _ carbon isotopic
Q23: Regarding the glacial ice sheet of Greenland,
Q29: Although these reptiles evolved as terrestrial animals
Q37: People in lower socioeconomic groups:<br>A) are underrepresented
Q49: Which of these terms describes substances that