Feature

What’s a Reef Doing in a Place like This?

Nova Scotia Fossils Illuminate 200-Million-Year-Old Changes

Biotechnology

Correction: A Common Medical Denominator

Nicotine Addiction

NIH Limits Animal Studies at Columbia

Shuttle Loss Sets Back Space Program

Correction: An Economic Case for Banning Smoking?

Biology

Back Matter

The AIDS Virus: Equine Similarities?

Biomedicine