In this paper Re define and study the non-parametric maximum likelihoo
d estimator (NPMLE) in the one-dimensional line-segment problem, where
we observe line-segments on the real line through an interval with a
gap which is smaller than the two remaining intervals, We define the s
elf-consistency equations for the NPMLE and provide a quick algorithm
for solving them, We prove supremum norm weak convergence to a Gaussia
n process and efficiency of the NPMLE, The problem has a geological ap
plication in the study of the lifespan of species.