Americans view the nation’s biggest challenge far differently from most of the world, according to new international polling. A Gallup survey of 1,000 respondents ages 15 and older across 107 ...

Biodiversity loss is continuing at an unprecedented rate, with species becoming extinct at between 100 and 1,000 times the average pre-human, or ‘background’, rate. Human activities are the main cause ...

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 ...