article_snippet.sent: This means that in one twin the hair might swirl clockwise, in one twin it will swirl anticlockwise — but it will swirl in exactly the same way.
article_snippet.sent: For one twin, the left side of the mouth might curve upwards; in one twin, the right side of the mouth has precisely the same curve.
article_snippet.sent: This peculiar ‘looking-glass effect’ extends to the positioning of internal organs.