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A New Kind of Cell Division

For hundreds of years, there have only been two main types of cell division in animals. But now researchers have identified a new and unexpected kind of cell division that occurs without DNA being replicated. Discovered in zebrafish skin cells, this newly spotted division, called asynthetic fission, could be a temporary measure used when growth is fast to make sure there's enough skin to go around. 

Reference: Chan KY, Yan CCS, Roan HY, et al. Skin cells undergo asynthetic fission to expand body surfaces in zebrafish. Nature. 2022;05:119–125. doi: 10.1038/s41586-022-04641-0