By Selwyn Duke

Years ago, when I worked with children, a parent told me that her daughter had just reached puberty.

The girl was seven.

Her brother was also “blossoming” — he was 10.

Far from being a family of outliers, these kids reflected a common phenomenon: Children today are entering puberty earlier than ever. Doctors aren’t sure why, either. (Yet I may have uncovered a major, though underappreciated, cause. I’ll get to that later.)

Read the rest here.