･We analyzed all the articles found on PubMed in the past half a century to clarify the pre-, contemporary-, and post-participation of researchers publishing articles containing the emerging keywords (elements of emerging topics), including Nobel prize-related ones.
･Smaller groups with fewer previous contributions to particular topics tend to generate Nobel prize class emerging topics.
･Currently, the same researchers reporting particular emerging topics tend to continuously study the same topics for their developments, while, in the 1990s, many other researchers participated their research to develop the reported emerging topics.
