This program describes the detective work and evidence for the generally accepted causes of two of the five mass extinctions, the KT and Permian. Then follows a diatribe on the speculation that human civilization may cause the sixth mass extinction.... (Full plot summary below)
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This program describes the detective work and evidence for the generally accepted causes of two of the five mass extinctions, the KT and Permian. Then follows a diatribe on the speculation that human civilization may cause the sixth mass extinction.
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