Imitation as a Strategy . Walk a hundred meters down any busy street in Addis Ababa and you can see the city thinking out loud. Five coffee shops in a row, three small restaurants ...

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

From punishing heat in North America to record-breaking floods in Europe and Asia, this year’s weather showed us what it looks like to live in a world that has warmed by 2 degrees Fahrenheit (1.1 ...

An individual retirement account, commonly known as an IRA, is a simple, tax-advantaged way to save money for retirement. There is a range of different types of IRAs (and strategies that come with ...

Mathematician Grigori Perelman solved the Poincaré conjecture, and then rejected the $1 million prize that came with it.