AUTHOR=Akasofu Syun-Ichi TITLE=When I Encountered Difficult Problems JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=Volume 9 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2022.879290 DOI=10.3389/fspas.2022.879290 ISSN=2296-987X ABSTRACT=In this article, I describe briefly my research experience when I encountered very difficult problems and how I responded.