Oliguria occurs when you urinate less than 400 mL of urine per day. It’s usually a symptom of kidney problems, and may be caused by dehydration, injury, or some medications. Most people without ...

This story appears in the September 2016 issue of National Geographic magazine. On January 10, 2019, a group of scientists reported in the journal Science that the world’s oceans nearly doubled the ...

Hellen Etiman, a Kenyan pastoralist, believed her severely malnourished son would soon recover after starting a course of life-saving specialised food. Lagos' first Street Art festival celebrates the ...