Feature

Off the Beat: On Ben Franklin, Pyramid Builders, Stonehenge’s Decoder, Sharks and the Green Revolution

Extraterrestrial Life (If There Is Any) and Us

Back Matter

Front Matter

Virus Enzymes: Weapons of Destruction

A Major Advance in Preventing Rejection of Transplanted Tissue

HEW Takes a Second Look at Research Cutbacks

A Presidential Boost for Energy Research

The Deformed Children of Alcoholic Mothers

A New Test for a Rare Disorder

Biomedical Outlook Good for 56-Day Mission

A New Acronym Joins Science-Policy Scene