Video of embryo cells during the first 24 hours
Scientists have made it possible for the first time to actually watch the initial 24 hours of development of an embryo at the cellular level. A newly developed microscope uses a sheet of light to scan a living organism from different directions enabling scientists to keep track of the complex development of an embryo. This video of three dimensional images illustrates the development of a zebrafish embryo as it grows from a single cell to 20,000 cells. The images that are taken at 10 minute intervals also show cells dividing and moving around the embryo to form specialized tissues. This new technique, called Digital Scanned Laser Light-Sheet Fluorescence Microscopy, can be used on other animals such as mice, frogs, and chicken, which would help researchers better understand evolution at the cellular level.
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