Cosmologists have an embarrassing problem: we don’t know what shape the universe is. The cosmos has three possible geometries—positively curved like a sphere, flat like an infinite plane or negatively ...

This page has been put together to help you practise and revisit some of the brilliant skills you’ve learned all through primary school. It’s a great way to boost your confidence in Maths and get you ...

Pupil shapes vary widely across the animal kingdom, from the W-shaped pupils of cuttlefish to the bar-like pupils of goats. But why are animal pupils shaped so differently? When you purchase through ...