A composite of a two-dimensional section of a sea urchin (gray) and 3D rendering of selected internal organs (colored). The modeled organs are the gonads (yellow), the digestive tract (blue) and so-called Stewart's organs (red).
Credit: Alexander Ziegler
Last summer, researchers demonstrated that non-invasive imaging combined with a staining technique enables the fast comparison and study of earthworm species and other animals in unprecedented detail.
From Scientific American View Full Article
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