Letters to the Editor

  1. Readers ask about cat contraception, big G and more

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  2. Readers react to depression in boys and clever ants

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  3. Readers react to a revamped insecticide and a chronic pain biomarker

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  4. Readers discuss meteorite identification, fly factories and more

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  5. Readers ask about Saturn’s icy rings, transparent fish and more

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  6. Readers discuss a subglacial cavern, how language shapes the brain and more

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  7. Readers ask about AI ethics, monkey tool use and more

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  8. Readers react to Neandertal diets and impressionist art

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  9. Readers react to a dwarf planet’s odd ring, dry farming and more

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  10. Readers ask about Earth’s inner core, plant movement and more

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  11. Readers ask about bird droppings, Ice Age cave art and more

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  12. Readers discuss net-zero carbon emissions and glass frogs

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