The ultrarunner and mountaineer finds peace through doing unimaginably hard things. By Lulu Garcia-Navarro My experience tells me that he is making a poor decision and will pay for it. By Kwame ...

Cheng, R. , Liu, J. , Hao, L. and Wu, D. (2026) On the Application of the Infinitesimal Method to Two Categories of Problems in College Physics. Open Journal of Social Sciences, 14, 378-389. doi: ...