Feature

Medical Ethics and Human Subjects

Virus Enzymes: Weapons of Destruction

Physical Sciences

Books of the Week

A Presidential Boost for Energy Research

Off the Beat: A Journey to China

A New Acronym Joins Science-Policy Scene

HEW Takes a Second Look at Research Cutbacks

Biomedical Outlook Good for 56-Day Mission

Natural Sciences

A New Test for a Rare Disorder

Front Matter