Dead of night
How do green plants cope with 24 hours of darkness for long periods? Does this affect oxygen production, and in turn cause any problems for local wildlife?
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Barmy rubble
When there is an archaeological find, earth has to be carefully removed to expose buried artefacts or building structures. Excluding nearby volcanic disasters, what causes a site to fill up with rubble and debris over time? Where does it come from?
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Give us a clue
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Point of impact
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Purr fact
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Plant departure
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