In his book "Arca Noë", Kircher argued that after the flood new species were transformed as they moved into different environments, for example, when a deer moved into a colder climate, it became a reindeer.
After the flood new species were transformed as they moved into different environments, it became a reindeer. This was for example. This was what Kircher argued in his book "Arca Noë". A deer moved into a colder climate.