For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

For people trying to make informed choices about their own health and that of their families, can be tough to make sense of ...

Hellen Obiri of Kenya set a women’s course record to win the New York City Marathon while compatriot Benson Kipruto won the men’s race by edging Alexander Mutiso in a photo finish. Obiri, who ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more.