New Health Tips boxes provide practical advice on diet, exercise, and lifestyle.

Expanded coverage of scientific methods include more detailed discussion of scientific theories, double-blind studies, and sample size.

The latest information on contraception, including advances in male contraception, is examined.

New findings on silicon breast implants are discussed.

A new section on healthy aging is included

The section on human evolution has been updated and expanded to incorporate the latest research findings.

New critical thinking exercises introduce useful concepts and further insight into how we suspend our critical thinking faculties.

And much more!