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Around 380 million years ago, paleontologists estimate that there were fish whose pectoral fins already had finger-like bones.
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The extremities of vertebrates developed from this.
3
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The skeleton of these limbs is based on the same blueprint.
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Finger, metacarpal and carpal bones.
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Even small genetic variations led to changes in the length and number of fingers.
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A variety of shapes emerged.
7
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A body part that can swim, run, fly or even grasp, depending on its design.
