treta yuga (sanskrit: त्रेता युग) is the second out of the four yugas, or ages of mankind, in the religion of hinduism. it follows the satya yuga and is followed by the dvapara yuga and kali yuga. treta means 'a collection of three arousing things' in sanskrit, and is so called because during the treta yuga, there were two avatars of vishnu that were seen, the sixth and seventh incarnations as 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 symbolises 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.