Mariann Torres dreamed of becoming a doctor for years, but unlike some of her peers, Torres comes from a “nontraditional background.” Born in Los Angeles and raised by a single mother, she spent her ...

PRINCETON, N.J. — Len Charlap, a retired math professor, has had two outpatient echocardiograms in the past three years that scanned the valves of his heart. The first, performed by a technician at a ...

The question: For the math-averse among us — number-crunchers like Nate Silver notwithstanding — a simple equation can cause a major headache. Why do some people find the task of balancing a checkbook ...