Feature

Light Halo Hints at a Galaxy’s Dark Matter

Back Matter

Books

Vertebrates’ Cousin Shares Key Genes

Front Matter

Protein Missing in Endometriosis Cases

Chronic Depression: Drugs Show Promise

Back to the Jurassic in Space-Age Subs: Deep-Ocean Exploration for the Next Millennium

Earth Science

Number 12 Steps up to Bat

Lyme Disease May Not Harm Kids’ Brains

A Bust Worth 1,000 Words?