Heard of Moo Deng? The famous pygmy hippo from thailand? Well Delhi zoo has managed to make one of its own. After 2 years, the zoo has seen the birth of a baby hippopotamus from a 9 year old mother. The zoo recently also witnessed the birth of 4 lion cubs, of which only 2 have survived. How did the zoo manage this? From mating to birth and the nurturing of the cubs, NDTV's Tanushka Dutta brings you the full story.