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  • Why Two Heads?

    Why Two Heads?

    Phenomenal Images

    Students explore images of planarians regenerating body parts as phenomena to explore cell division and differentiation.

  • Identifying the Key Genes for Regeneration

    Identifying the Key Genes for Regeneration

    Scientists at Work

    (9 min 55 sec) This video describes how scientists silence different genes in regenerating planaria to study the process of regeneration at the molecular level.

  • Synchronized Division

    Synchronized Division

    Phenomenal Images

    Students explore a photo of early embryonic cells as a phenomenon to learn about cell division and development.

  • Planarian Regeneration and Stem Cells

    Planarian Regeneration and Stem Cells

    Scientists at Work

    (11 min 47 sec) A mini-documentary discussing the remarkable regenerative capabilities of the planarian, and how HHMI researcher Alejandro Sánchez Alvarado uses them to study the biology of stem cells.