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GROWING up in South Africa, author Lyall Watson owed his life to the sharp sense of smell of his pet warthog, Hoover. Seeing the little beast disappear down a convenient bolt-hole alerted him to the fact that he was walking straight into the path of a lion.

Years later, he has shown his gratitude by penning a testimonial to the many talents of the common warthog and its porcine kin – particularly the domestic pig, that docile offspring of the fierce Eurasian wild boar.

The familiarity gained through a 30,000-year association has made most humans indifferent to the many virtues of…

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