Its fraternal twin, however, opted for a smooth aluminum construct on the back.

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Until 15 September, the gallery is showcasing the works of Hasan and Husain Essop, fraternal twin brothers born and raised in Cape Town whose photographs probe the tension between the self and others.

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Among fraternal twins, the likelihood that a second twin will have autism is 35% nearly twice the risk other siblings face, the study found.

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