Movies: Extinction

We're entering the Earth's sixth era of extinction -- and it's the first time humans are to blame. CNN introduces you to the key species and people who are trying to prevent them from vanishing....

Say Goodbye is a 1971 American documentary film about the relationship between humans and nature, directed by David H. Vowell. The film depicts the plight of various animal species at the hands of man and his influence. Some segments include the club...

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