[Memory IC]
The Monarch Butterfly migrates every year in large numbers and overwinters on a huge scale. Amazingly, it's carried out over several generations. After leaving the breeding ground in North America to the wintering places, such as Mexico, only the offspring of 3 or 4 generations comes full circle. The information for this yearly action is transmitted through, not only the informational DNA but also the tubes connected to the pupa from the outside world, which they use to be nourished. Another function of this tube is to help overwriting the follow-up information in their memory circuit. These are the latest findings.