News

  1. Genetics

    Ebola genome clarifies origins of West African outbreak

    Genetic analyses suggest that a single infected person sparked the ongoing Ebola epidemic in West Africa.

    By Tina Hesman Saey
  2. Anthropology

    Siberians came to North American Arctic in two waves

    Siberian ancestors of the modern-day Inuit replaced a 4,000-year-old North American Arctic culture, a DNA study reveals.

    By Bruce Bower
  3. Health & Medicine

    To grow new knee cartilage, look to the nose

    Cartilage-making cells from the nose grew into patches that successfully replaced damaged or missing cartilage in the knees of goats and of humans.

    By Nathan Seppa
  4. Astronomy

    Wake of nearby supernova hints at explosion’s origins

    Gamma rays from radioactive decay of cobalt formed in a nearby supernova reveal unprecedented details of the explosion’s aftermath.