![]() ![]() ![]() So an iris has three, a primrose has five, a delphinium eight, a ragwort 13, an aster 21 and daises 13, 21, or 34. The number of petals in most flowers also follow the sequence. These spiral patterns are also found in pineapples, cauliflowers and pine cones. The spiral numbers in a sunflower will always total a Fibonacci number, while dividing those pointing right and left will give you two consecutive Fibonacci numbers linked by the ratio 1.68. It usually marks the proportion of your hand to your forearm and your outstretched arms to your height. The ratio of 1.618 has already been found externally all over the human body. "This is the first time anyone has looked at this, so I am pleased it turned out so nicely," Verguts told the Guardian. ![]() The age when women are most fertile on average - between the ages of 16 to 20 - the ratio was 1.6. Verguts found that the ratio is around two at birth but this decreases as women age to 1.46. ![]()
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