Digimon are monsters of various forms living in a "Digital World," a parallel universe that originated from Earth's
various communication networks.
Digimon hatch from eggs called Digi-Eggs. (In the English language iterations of the franchise there is another type of
Digi-Egg that can be used to Digivolve, or transform, Digimon. This second type of Digi-Egg is called a "Digimental"
in Japanese.) They age via a process called "Digivolution" which changes their appearance and increases their physical
powers. Some Digimon act feral, like wild animals. Most, however, possess human intelligence, speech, and personality traits.
The first Digimon anime introduces the Digimon life cycle: they age in a similar fashion to real living organisms, but
do not die under normal circumstances because they are made of reconfigurable data. Old Digimon and Digimon who receive fatal
wounds dissolve into infinitesimal bits of data. The data then recomposes itself as a Digi-Egg and the Digimon goes through
its life cycle again. Digimon who are reincarnated in this way will sometimes retain some or all their memories of their previous
lifespan. However, if a Digimon's data is completely destroyed, they will die.