Biometry, or Biometrics, the application of statistics to the study of living things. Biometry is especially useful in studying growth or biological similarities and differences. It is a vital part of insurance, public health, forestry, and many other fields.
How can children from the same parents look so different? I mean, why don't all kids from the same parents look exactly alike, since the parents just have one set of chromosomes each and they don't change?
You get home from a long day, and all you want to do is see your family. But when you walk in the door, your family isn't your family. They've been replaced by imposters -- or you have capgras syndrome.