Frank Bates describes how a project related to chewing gum led to materials science discoveries.

Abigail Marsh describes mechanisms of altruistic kidney donors' responsiveness to others' emotions.

Robert Epstein of the American Institute for Behavioral Research describes how search engine rankings can influence voter preferences.

Seth Burgess describes a timeline of events surrounding the end-Permian mass extinction.

Yaara Oren and Tal Pupko describe how bacteria can evolve via transfer of gene regulatory regions.

Noam Sobel explains how a human olfactory fingerprint helps uncover the uniqueness of individuals’ sense of smell.

Rino Rappuoli of GlaxoSmithKline discusses preclinical studies of a vaccine candidate against Staphylococcus aureus.

As AAAS president for 2015, Geraldine Richmond focuses on global scientific engagement.

Susan Fiske describes how intentional acts of harm motivate people to assign blame.

Jef Boeke explains how to safeguard against unauthorized growth of engineered microorganisms.