As he approaches 80 and reflects on his life as a pre-eminent neurologist and author, Oliver Sacks talks about hallucinations – drug-induced and otherwise
Dentists are using the technology to make precise models of patients’ faces, jaws and teeth, so as to plan procedures such as implants and facial surgery
Graphene: Faster, stronger, bendier
The material may have many uses but its discoverers are warning not to expect an immediate revolution