There is a nugget of truth to this idea: About 90 percent of brain cells are white matter and are never used for thinking.

Here, the story does not end with fleeing war. Another phase begins, one where days are measured not in hours, but in the weight of loss and the effort to carry on.

The health authorities in Burundi, with support from the World Health Organization (WHO) and partners, are deepening investigations to determine the cause of an illness that has led to five deaths and ...