Older brother Abderrahmane_Morceli was 13 years the elder of Nouredinne, and was also his coach.
PBs of 3:39.7 in the 1500m and 1:45.7 in the 800m. Competed in both the 1980 and 1984 Olympic Games.
https://en.wikipedia.org/wiki/Abderrahmane_Morceli
Nouredine won Olympic Gold in 96 as well as 3 straight WCs.
PBS of 3:27.37 in the 1500m (WR) and 1.44.7 in the 800m.
How can such a huge difference be explained. Is it really likely that Nouredinne was so much more gifted than his brother? His training could hardly have been very much different as his brother was his coach!