http://www.sciencemag.org/news/2018/07/did-study-indonesian-people-who-spend-their-days-under-water-violate-ethical-rules

A controversial study showed that the Bajau are good divers thanks in part to an enlarged spleen.

In April, a paper showing why Indonesia's Bajau people are such great divers drew worldwide attention as a striking example of recent human evolution. But the study, published in Cell, has created a different kind of stir in Indonesia, where some say it is an example of "helicopter research" carried out by scientists from rich countries with little consideration for local regulations and needs.