Long before winter seals the forest under ice, certain frogs begin preparing for a transformation that defies basic biology.
These microscopic, confocal images of a zebrafish heart, and histological slices of frog (Hyla japonica) and mouse hearts, show the different locations of the branching points of coronary arteries: in ...
Preface -- General account -- Common names -- Present classifications -- Scientific name -- Specific evaluation of our North American forms -- Range -- Habitat ...