Why are some people taller than others?

You are quite right that is a big puzzle.

Why Are People Taller Today Than Yesterday? - TIME

I used to be taller than my friends. Why are they all taller than me now? - Quora

Why are some people way taller than their family? - Quora

What is the average height for men?

Genomelink, Why are some people taller than others? While environment (like diet and nutrition) can play a role, one study showed that 80% of height

Frontiers People Are Taller in Countries With Better Environmental Conditions

Ever Wondered Why Some People Are Taller Than Many Others? - Tata 1mg Capsules

World's Tallest Family? How Do You Measure Up Against The Clarks?

How to increase height: Factors that influence growth

Why do some people with identical height look taller? - Quora