Every day, tens of millions of children go to school—or to bed—hungry. Not only does it take a toll on their studies, hindering their chances of a better life, it also stunts their growth and makes them more susceptible to illness and disease.

Scroll and click around the map to see where in the world children are underweight, which is defined as two standard deviations below the median of the NCHS/CDC/WHO International Reference Population. It’s a pretty good indicator of kids who are chronically hungry.

The data covers 1990-2002 and isn’t available for all regions (those that are unavailable appear blue on the map). The raw data was compiled by the Center for International Earth Science Information Network.

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