Work is underway to try and identify reasons for child stunting beyond poor nutrition, and the answer may be found with nuclear technology according to the UN.
In 2014, one in every four children under five years of age was stunted, a total of 159 million globally.
Nutrition interventions alone are not fixing the problem.
Now, the International Atomic Energy Agency (IAEA) is using nuclear techniques as part of broader research into stunting.
Steve Thachet reports from the agency’s headquarters in Vienna.