Plan how long to study for the PE exam with our guide on study schedules, practice exams, prep courses, and an in-depth ...

A recent study of cognitive analyses says the average intelligence quotient, or IQ, in the United States is about 98.

Forming healthier habits can be an elusive goal. Now, scientists are offering a chance to join the latest research, which could help you find ways to better health. Here’s how to sign up.