○○○ oar ⪢⪢
Besides its streamline body, its most obvious adaptation into underwater life is a
pair of feathered rear legs that have evolved into oars and help it maneuver underwater.
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• 1202 Leonardo Fibonacci
Fibonacci asked himself how many
pairs of rabbits originated from a single
pair in one year. Each
pair of rabbits will produce exactly one more
pair of both sexes per month which in turn would be fertile from the second month after birth.
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