Feature

Hyperactivity: The Family Factor

Phobos: Mission to a Martian Potato

Nix the Bear with Syphilis

A Burst of New Data from Supernova 1987 A

Will Cancer Spread? Sound out NMR

Neptune’s Nereid: Another Mysterious Moon

Back Matter

Never Too Late to Quit

Pessimistic Outlook in AIDS Reports

Scavenger Hunt Yields Hominid Diet Clues

Reagan-Gorbachev Space Agreement

Front Matter