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  • Colorizing Skin Cells

    Colorizing Skin Cells

    Image of the Week

    The “skinbow” zebrafish has color-coded skin cells when viewed in a microscope using UV light illumination.

  • One Bone, Two Bones...

    One Bone, Two Bones...

    Image of the Week

    This short-tailed fruit bat embryo shows a pattern of bones in its limbs characteristic of all tetrapods: one bone, two bones, lots of bones, digits. 

  • Repellant ephrin signals guide limb innervations

    Repellant ephrin signals guide limb innervations

    Animation

    (1 min 34 sec) The growth cone of a neuron avoids repellant molecules and navigates to innervate the appropriate muscle.