Feature

Front Matter

Never Too Late to Quit

DNA or ERA?

Pessimistic Outlook in AIDS Reports

Ranch Hand’s Dioxin Legacy

Scavenger Hunt Yields Hominid Diet Clues

HIV Ancestry Traced in Family Tree

Neptune’s Nereid: Another Mysterious Moon

Genetics Helps Reel in Bigger Fish

Reagan-Gorbachev Space Agreement

From Massive Star to Supernova Remnant

A Cosmic Egg Wrapped in a Gaseous Shell