We find a characteristic-free algebraic condition for developability of uniruled varieties. As an application, we study developable varieties over positive characteristic fields. In particular, we generalize classification theorem of one parameter developable ruled varieties to arbitrary characteristic.
"Developable varieties in positive characteristic." Hiroshima Math. J. 35 (1) 167 - 182, March 2005. https://doi.org/10.32917/hmj/1150922492