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that mass extinctions of mammoths and wild horses 10,000 years ago were caused by natural climate shifts |
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whether humans were to blame for extensive destruction in the natural world and also for the pollution of the oceans |
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how scientists began to understand clearly what dinosaurs ate and why they disappeared from the face of the Earth |
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if an olive branch buried for thousands of years in volcanic ash could have revealed the fate of the great Minoan civilization on the Greek island of Thera |
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when it was scientifically established that dinosaurs belonged to a large group of reptiles called archosauria |