Two letters on bias in academia.

Mathematician Dr. Steven Strogatz breaks down the history of the math concept and brings it full circle to recent science.

Scientists have studied trees depicted in various works of art and found they follow relatively simple mathematical rules also found in branching patterns in nature.

The pair, who work with children of all ages and ability levels in several Brooklyn neighborhoods, recently opened their first brick-and-mortar site.

Pi Day was first celebrated in 1988 at San Francisco's Exploratorium, a museum of science and technology that encourages visitors to be hands-on.