How do sperm swim? How do they navigate? What is sperm made of? What does a World War Two codebreaker have to do with it all? The BBC untangles why we know so little about this mysterious cell.
Nearly one-third of the US’s war veterans have been arrested or jailed at some point in their lives – a new programme using horse-therapy is attempting to tackle the underlying trauma they have suffered.
At least 29 people have been killed in flood waters and landslides in the Democratic Republic of Congo’s capital, Kinshasa, following unusually heavy rains in the dry season, the interior ministry has said.
