Twisteddoodles takes on vaping
This week's cartoon from Twisteddoodles
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Would you see further from a mountain on a large or a small planet?
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At what age would a child be capable of surviving in the wild? Part 2
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This week鈥檚 new questions
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Mathematics
The Monty Hall problem shows how tricky judging the odds can be
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Life
The dangers of amorous ostriches when starting an ostrich farm
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Life
An amazing great bustard gets ready for a new nature exhibition
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Tom Gauld on a graphical downturn
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Twisteddoodles on the northern lights
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Space
How to spot rare and beautiful noctilucent clouds
Long summer nights are the perfect time to see the electric blue wisps of these "night shining" clouds, which create patterns like the aurora, says Abigail Beall
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How would Earth be affected if Sirius were to go supernova?
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How did ancient Britons mark the solstices with Stonehenge? Part 2
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Why can a fly enter my home easily, but not escape as easily? Part 2
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This week鈥檚 new questions
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