Biology is complicated and in many ways, unpredictable.
No matter what kind of expectations we may have for how people will turn out when they're born, the reality is that aspects of ourselves we consider basic enough to take for granted are the result of a complicated series of interconnecting development processes.
And while the ways that these processes vary are often too subtle to detect, they can sometimes present themselves in surprising ways that present challenges for doctors and researchers.
But as one astronomically rare case from California illustrates, these anomalies have the most serious implications for the person actually experiencing them.
