Professor Jean-Jacques Muyembe is a scientific icon in DR Congo. He's also an inspiration for the next generation of Congolese biologists. Also in this edition of Across Africa, more than 30 percent of harvests are lost to pests and disease. A team of Ghanaian engineers are coming up with new ways to identify risks early. And we see how Gambian rising star Maryama Cham is carving out a path for herself in a music industry largely dominated by men.