What is the smallest animal with eyes and could it see a molecule?
How small can eyes be, and would they be able to spot something as minuscule as a molecule?
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Where does the spin of celestial objects come from? The big bang?
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Plastic is inert, so why does it have a taste and smell?
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This week’s new questions
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How long is ‘now’, the gap between the past and the future?
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Can you get triple or quadruple rainbows? (continued)
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If plants communicate via their roots, do they get lonely in pots?
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This week’s new questions
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Why are tree leaves so many different shades of (mainly) green?
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Can satellites have satellites that have satellites?
To what extent could a moon have a moon with its own moon? Is there a limit? Readers respond
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Why do cabbages exist when their shape prevents photosynthesis?
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This week’s new questions
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Why don’t high-flying birds freeze in the frigid temperatures?
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Do we perceive colours around us differently to others?
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