This week’s new questions: all about mulberries
Why does the juice of unripe mulberries remove stains made by ripe berries, and why does it also work with milk?
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Life
Why fun is so important and how we benefit from play
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Life
Beautiful close-ups of endangered big cats make real catwalk look tame
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Tom Gauld on the science of taking a break
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Twisteddoodles on when a butterfly gets a new look
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Earth
Did an asteroid impact 65 million years ago really kill the dinosaurs?
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Health
Small wonder: See the microscopic knotted beauty of a surgical stitch
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Humans
The scientific shortcuts to cooking delicious caramelised onions
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Banana split: Artwork provokes fresh conflict between art and science
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Burning hot: Are all flames the same temperature?
Readers explain what factors affect the heat and colour of a flame and the chemical processes involved
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Dead before his time: a question about time travel
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This week鈥檚 new questions
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Space
Jill Tarter: The hunt for alien life is only just beginning
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Space
This Christmas Eve, spot Santa’s sleigh flying through the sky
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