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Why do these fossil shells flip their spirals every few millennia?
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Why do these fossil shells flip their spirals every few millennia?

There's a fascinating mystery surrounding foraminifera, tiny marine organisms that build spiral shells. These shells can flip their coiling direction simultaneously across the globe, which has puzzled scientists for decades. Recent research suggests that this phenomenon might not be an adaptive response but rather a marker of significant evolutionary events. By connecting modern genetic insights with ancient fossil data, researchers are shedding light on this intriguing process.
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