The secret of the world’s largest seed revealed

The coco de mer palm of the Seychelles is the stuff of legend. Its seeds – the largest and heaviest in the world – were once believed to grow on trees beneath the waves of the Indian Ocean, and to hold great healing powers. How does a plant that grows in poor quality soil on just two islands produce record-breaking seeds that reach half a metre in diameter and can weigh in at around 25 kilograms? Image: Christopher Kaiser-Bunbury

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