○○○ would ⪢⪢
When Persephone was with her mother, Demeter _____ shine from happiness and the land _____ become
fertile and fruitful and this was spring and summer.
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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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