LifeEye of the shoal: Inside the surprising world of fishWhy do some fish sport beautiful colours? Can they feel pain? What’s special about lanternfish? The piscine world is awash with surprises, reveals a new bookCulture
HumansNine curious colours that shaped the history of artFrom purple sea snail milk to arsenic green and a yellow made from urine, we’ve gone to bizarre lengths in our millennia-long quest to create the most vibrant shadesFeatures