Five Plants that Changed the World

Yams, pteridophytic ferns, cinchona trees, potatoes, and the American Southern Live Oak have each played a pivotal role in human history, helping to save the world from dire illness and send humans to the moon. Embark on a historical odyssey that uncovers the botany behind how ferns form the foundation for petrochemicals, why tree bark helps slow the spread of malaria, and how yams make modern contraception possible.

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