The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical conceptsWhy aren’t more animals hermaphrodites? Snails and worms seem to have been successful using that method for sharing genes between any two individuals, but vertebrates evolved away from it. Why? Janet Lesley, Kent, UKSend new questions to nq@theguardian.com. Continue reading...
Tuesday 28 October 2025
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Readers reply: Why aren’t more animals hermaphrodites?
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