She discovered a a skull fossil of an ancestor of apes and humans
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Any subject of study needs justification: its advocates must explain why it is worth ... In the past history has been justified for reasons we would no longer accept. ... History should be studied because it is essential to individuals and to society, and ... Only through studying history can we grasp how things change
Explanation:
Antonyms of joyful are sad, distressing and missable.
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b. was the result of increased competition for open range.
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