Drag to orbit · scroll to zoom
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Spermatozoa swim inside a real 3D cryostraw as it moves from collection dish to controlled-rate cooling, liquid-nitrogen vapor and plunge, long-term storage, and rapid thaw. The same survival-fraction math as the 2D simulator — driven by cryoprotectant concentration and cooling rate — decides which cells stay green and motile and which turn grey, now rendered as genuine WebGL geometry you can orbit and zoom.