The mass M and the height H for humans: (a) and (b) for the data from Sweden, (c) from Korea, and (d) from WHO (see text for details of the used datasets). The linear regression for the entire data in (a) for Swedish children gives the Benn index p = 2.1. In (b), we divide all Swedish data into two groups depending on whether the child is younger or older than one year after birth. The left part of the data for children younger than one year old has p ≈ 2.8 while children older than one year (the right part of the data) has p ≈ 1.8. (c) Data for Korean children drawn in the same way as for (b), giving us p ≈ 2.5 and p ≈ 1.9 depending on the age group (younger and older than one year, respectively). (d) WHO data displayed in the same way. Again, we see the change of p value at around one year after birth. Although all data points in each dataset are used to perform the linear regressions in (a)–(c), we use only 10000 randomly chosen points in each scatter plot for (a)–(c), only for convenience of visibility.