When the world’s oldest woman passed away at 117, much was made of her three yoghurts a day diet. But what role does yoghurt actually play in longevity?
Primates eat bitter bark to kill parasites, while sparrows use cigarette butts to keep ticks off their chicks. Could the wisdom of wildlife be the next frontier in medicine?
The abrupt halt to US funding threatens to undo decades of advances, dramatically increasing infections and deaths, but some see an opportunity for Africa to lead the response