Feature

Heroin: The Law Promotes the Crimes

Japan Launches Probe to Comet Halley

Behavior

Protean Ways of Epstein-Barr Virus

Frog Talk: Chirp, Chuckle and Thump

A ‘Mosaic’ Ape Takes Shape

$70 Million Pledge for 10-m Telescope

Front Matter

Two-Year Risk for Former Mental Patients

Environment

Soviet Halley Probes Carry U.S. Gear

Physical Sciences