HumansAn incredible Denisovan skull is upending the story of human evolution An ancient skull has finally shown us what the Denisovans looked like. Now it turns out they, not Neanderthals, might be our closest relatives, redrawing our family tree and transforming the hunt for Ancestor X Features
MathematicsWhy mathematicians want to destroy infinity – and may succeed Mathematicians who call themselves ultrafinitists think that extremely large numbers are holding back science, from logic to cosmology, and they have a radical plan to do something about it Features