Flying Down the Track
World-class athletes of both sexes cover 100 metres in about 10 seconds. What percentage of this is spent not touching the ground? And what's the figure for a 2-hour marathon?
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Thorny problem
I am puzzled by brambles, raspberries and blackberries. They have sweet, juicy fruit, presumably so they will be eaten by animals who will spread their seeds. But they also have prickles. What's the good of that?
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First name basis
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Wine Breathing
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Peculiar pretzels
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Winding up
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