PhysicsBlack hole entropy hints at a surprising truth about our universe Two clashing ideas about disorder inside black holes now point to the same strange conclusions, and it could reshape the foundations of how we think about space and time Features
EarthHow worried should we be about noxious chemicals from dead satellites? We have more satellites than ever before, but when they burn up they create a new kind of air pollution. Evidence is now revealing what effects this could have and how to tackle it Features