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 ...

The editorial board is a group of opinion journalists whose views are informed by expertise, research, debate and certain longstanding values. It is separate from the newsroom. Thirteen years ago, no ...

Consumers trashed enough clothing last year-120 million metric tons, to be exact-to fill over 200 Olympic stadiums. About 80 percent of discarded textiles were landfilled or incinerated in 2024, with ...

Halve, between 1990 and 2015, the proportion of people whose income is less than $1.25 a day The target of reducing extreme poverty rates by half was met five years ahead of the 2015 deadline. More ...

Sleep disorders are ongoing problems that make it hard to sleep well and can lead to daytime tiredness, mood changes, and low concentration. Common sleep disorders include insomnia, sleep apnea, ...

Brain fog is a symptom, not a diagnosis, that can cause confusion, memory problems, lack of concentration, and mental fatigue that disrupts daily life. Common causes include chronic stress, lack of ...