Develop a model to describe how food is rearranged through chemical reactions forming new molecules that support growth and/or release energy as this matter moves through an organism.

  1. Chemistry

    Explainer: What are oxidants and antioxidants?

    Certain chemicals, including many in foods, fight chemical reactions that could harm cells in the body and in wildlife.

  2. Health & Medicine

    Building a food pyramid

    Experts are trying to work out new rules on which foods to eat and which ones to avoid.

  3. Humans

    A human migration fueled by dung?

    When people crossed from Asia to the Americas thousands of years ago, burning dung may have kept them warm.