Sea sponges are some of the world’s simplest animals – but even so, the rhythm of night and day kicks off a crucial stage of their life cycle.

A pothole is usually not the disease – it is the visible symptom. The main engineering challenge is trying to stop them forming in the first place.

Recent drone and GPS jamming attacks on Germany and Romania have ratcheted up tensions between Russia and the rest of Europe.

Becoming a father naturally drops men’s testosterone levels. And the more involved they are, the more it drops.