PhysicsSmallest subversive: Mathematical fight for our world At stake in the fierce 17th-century debate over a mathematical concept was nothing less than our modern world, says Amir Alexander in InfinitesimalCultureLab
TechnologyWe turn brainwaves into sound for music and medicine A neuroscientist and a musician explain how they built the Brain Stethoscope, which is both brain scanner and musical instrument CultureLab