Complex sentence: Mangle's work didn't end when he left Germany and while posing as a vet, he continued his twin experiments in Latin America where now in the Brazilian farming community of Candido Godoi one in five pregnancies are twins.
Split into simpler sentences: Mangle's work didn't end when he left Germany and while posing as a vet, he continued his twin experiments in Latin America. This continuation of experiments is likely the reason for the fact that in the Brazilian farming community of Candido Godoi, one in five pregnancies are twins.