<P> In the Katha Upanishad, Yama is portrayed as a teacher to Nachiketa, the legendary little boy, and their conversation evolves to a discussion of the nature of humans, knowledge, Atman (soul, self) and moksha (liberation). </P> <P> In the Epic Mahabharata, he is the father of Yudhishthira (also known as Dharmaraja), the oldest brother of the five Pandavas (Karna was born prior to Kunti's wedlock, so technically Karna is Yudhishthira's older brother) and is said to have incarnated as Vidura by some accounts in the Mahabharata period . </P> <P> In other texts, Yama is called Kāla ("Time"), but so are other gods in Hindu pantheon, such as Shiva . the latter is also called Mahākāla ("Great Time") in his form as the destroyer of the world . Among the Nuristanis, the deity is known as Imra . </P> <P> In the Rig Veda he is mentioned as the son of Vivasvat and of Saranya, the daughter of Tvastar, with a twin sister named Yami . Only three hymns (10.14, 10.135, and 10.154) in the Rig Veda are addressed to him . There is one other (10.10) consisting of a dialogue between Yama and his sister Yami . Yama's name is mentioned roughly fifty times in the Rig Veda, but almost exclusively in the first and (far more frequently) in the tenth book . </P>

Yama the god of death in hinduism uses what animal as his transport