Uncategorized

  1. Paleontology

    A human migration fueled by dung?

    When people made their way from Asia to the Americas, the path they took may have been covered in dung.

    By Sid Perkins
  2. Earth

    For European lakes, how clean is clean enough?

    New research on lakes in Denmark suggests that agriculture has been affecting water quality there for more than 5,000 years.

    By Sid Perkins
  3. Health & Medicine

    Clot buster attached to red blood cells avoids complications

    Attaching a clot-busting drug to red blood cells limits the drug's side effects, a study in animals shows.

    By Nathan Seppa
  4. Chemistry

    Chemical rings act as a minirotor

    Interlocked molecular rings form new minirotors, including some in which scientists can control the rotational direction.