Feature

Undesirable Sex Partners

Front Matter

Books

Sol y Sombre

Pursuing Life on Two Frontiers

Boning up on Postmenopausal Hormones

Lens Gets X Rays to a Point

Deadly Ebola Virus Seen to Thrive in Bats

Depression Fails to Scar Personality

Gene Variations Sway Prostate Cancer Risk

Ant Life: It’s a Sister-Eat-Brother World

Astronomy