Why does sticking my tongue out seem to help me concentrate?
Sticking our tongues out might just be a mental by-product of carrying out a fiddly task with our hands, and one reader finds that it helps clear their head
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Why does a candle make more smoke just after it has been put out?
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What is this shell-like structure (pictured) found in a disused mine?
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Why can鈥檛 I judge bathwater’s temperature with my left hand? (cont)
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This week鈥檚 new questions
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If energy cannot be created or destroyed, where does it come from?
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In the cold, why does our body require warm covers but not our face?
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What caused this red-only rainbow, when there was no rain? (part 2)
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This week鈥檚 new questions
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Why do only some materials glow under UV light?
Phosphorescence is all down to tardy, excited electrons, and without this there would be no glow-in-the-dark paints
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What is the best way to store images for the next 100 years? (Part 2)
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The universe is expanding, but what is it expanding into? (Part 2)
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This week鈥檚 new questions
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How can our own farts smell tolerable when other people鈥檚 smell awful?
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