Spectacular cell division of an egg frog (Rana temporaria) filmed over a period of 33 hours and presented through a timelapse of 23 seconds. About 3 hours after the sperm penetration, 2 plans of the divisions share the egg into 4 cells, then divisions quickly turns until you reach nearly 4 million cells. A few days later, a tadpole will naturally emerge from egg. A video made by the photographer Francis Chee.