Five years ago, mathematicians Dawei Chen and Quentin Gendron were trying to untangle a difficult area of algebraic geometry involving differentials, elements of calculus used to measure distance ...

A US oil blockade is causing a severe energy crisis in Cuba, as the government has been forced to ration fuel and cut electricity for many hours a day, paralysing life in the communist-ruled island ...

Blood cell disorders affect red blood cells, white blood cells, or platelets made in bone marrow. They can be acute or chronic. They can also be genetic, the result of other conditions, or ...