Watch countries appear one-by-one to form a cohesive world map, when they are ordered by population.
Machine learning technology is allowing researchers at Facebook to map the world population in unprecedented detail.
See the world's 100 biggest islands in a side-by-side comparison. Then, we look to see which islands have the highest population densities.
This animation shows the population density of U.S. counties between 1790 and 2010, showing the westward expansion of the country's population.