"In the above poster the cities are arranged (roughly, in order to maximize space) by population. Clearly, size and population are not directly correlated. Some cities take up a lot more space for a smaller population. The relationship between the two, of course, is known as density (population density, urban density)."
"Population statistics are like crystal balls -- when examined closely, they can help predict a country's future (and give important clues about the past). Kim Preshoff explains how using a visual tool called a population pyramid helps policymakers and social scientists make sense of the statistics, using three different countries' pyramids as examples."
The supercheap and palatable noodles help low-wage workers around the world get by, anthropologists argue in a new book. And rather than lament the ascendance of this highly processed food, they argue we should try to make it more nutritious.
"For millions of refugees across Africa life is a daily struggle. Many dream of one day returning to their homeland while others have spent decades building a new life. On World Refugee Day, BBC Focus on Africa's Anne Soy visits a Somali family in Nairobi, Kenya, who cannot imagine returning to their roots."