How do fish recognise others of their own species? Part 2
Another expert reader explores this thorny topic, including reference to the behaviour of their own archerfish
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Are flies following a strategy when they keep hitting a window? Part 2
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This week’s new questions
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Comment
Why do fictional geologists keep getting killed off in movies?
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Tom Gauld on artificial cells
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Twisteddoodles on children’s flexible ears
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Earth
Negatives saved from Shackleton’s Antarctic trip reveal hidden details
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How do fish recognise others of their own species?
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How many known elements could we delete without ill effect? Part 2
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This week’s new questions
Why don’t dogs look up when a low-flying plane or helicopter passes overhead? I’ve never seen one do this. And what changes will occur on Earth as the moon moves further away from us?
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Comment
Can you guess the origin of 7 tiny species on a fictional archipelago?
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Tom Gauld on immersive bat research
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TwistedDoodles on science podcast demographics
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Tom Gauld: My confidence in my understanding of the scientific theory
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