If I go barefoot in snow my feet soon hurt, yet my dog seems OK. Why?
There are many reasons why canine feet are resistant to the cold, say our readers
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What鈥檚 the most efficient way to load passengers into planes? (part 2)
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This week鈥檚 new questions
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Study finds it is ‘barely possible to identify a beautiful scrotum’
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Tom Gauld: Success is 10% inspiration and 90% perspiration
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Twisteddoodles: We need you to highlight your research on social media
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Humans
What is really going on when we microwave our food?
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Why is the left hand used for intricate fingerwork on the violin?
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How and why is hissing so common in the animal kingdom?
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Is it possible to tell sunrise from sunset in an image? (Part 2)
An ex-postman recalls his vivid memories of the colours of dawn, and the discussion continues about the famous depiction of a sunset by the painter J. M. W. Turner
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This week鈥檚 new questions
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Enumerating the trivial superpowers our readers possess
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Comment
See our pick of the entries for the Sony World Photography Awards
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Mind
How to stop procrastinating and start getting things done
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