Photograph titled 'Twin snow leopard cubs at Whipsnade Zoo'. Caption on back reads: Twin snow leopard cubs born at Whipsnade Zoo, June 22, are at last allowed out to explore their new world. (They have not been named yet). Their mother is called Olga and their father Ivan. The two cubs, one male and one female, ar ethe first of their kind ever born here. Their parents came from Moscow 18 months ago in a big animal exchange deal with the Russians. OPS. the two cubs shelter under mother Olga from the cold wind.