News

Space

Planets’ gravity tidies stellar ring

The vast dust disk around the star Fomalhaut hints at a pair of orbiting bodies.

Humans

Chemists distinguish between gunshot residue from various firearms

Analytical technique could lead to better crime scene investigation.

Health & Medicine

Extreme eaters show abnormal brain activity

Seeing images of food revs up reward areas in the obese and slows them down in severely underweight people, a brain scan study shows.

Life

Stem cell treatment spurs cartilage growth

A small molecule called kartogenin prompts the manufacture of lost connective tissue in mice.