Treta means 'a collection of three things' in Sanskrit, and is so called because during the Treta Yuga, there were three Avatars of Vishnu that were seen, the fifth, sixth and seventh incarnations as Vamana, Parashurama and Rama, respectively. The name could also be derived from the fact that the Treta Yuga lasted 3,600 divine years, or 1,296,000 human years. The bull of Dharma symbolizes that morality stood on three legs during this period. It had all four legs in the Satya Yuga and two in the succeeding Dvapara Yuga. Currently, in the immoral age of Kali, it stands on one leg.