Guides
Plain-English explainers on population pyramids, demographics and world geography — plus tips to sharpen your daily Pyramiddle game.
Daily Geography Games Like Wordle (2026)
A friendly tour of the best daily geography games in the Wordle family — from guessing countries by outline or flag to reading a population pyramid.
Game tipsHow to Guess the Country From a Population Pyramid
A practical strategy guide for Pyramiddle: turn a population pyramid's shape, total population and the distance hints into the right country in six guesses.
Demographics 101How to Read a Population Pyramid (a Beginner's Guide)
What a population pyramid is, what its shape tells you about a country's past and future, and how to read one at a glance — in plain English.
Demographics 101The Demographic Transition, Explained in Five Stages
How countries move from high birth and death rates to low ones — the demographic transition — and how each stage reshapes the population pyramid.
Demographics 101Total Fertility Rate & the 2.1 Replacement Level, Explained
What total fertility rate (TFR) means, why 2.1 is the magic replacement number, and how it shapes whether a country's population grows or shrinks.
Demographics 101Why Some Countries Are Young and Others Are Old
What 'young' and 'old' countries really mean, why their population pyramids look so different, and what an ageing or youthful age structure means for the future.