Another revelation that Puranas have mirrored the real history of the past in diverse angles has been brought out by Prof KS Valdiya in his recent book. Dr S Kalyanaraman's review of this book is provided at the end of this post. Before reading that let us have an entertaining piece from Dr Witzel. In his post in a yahoo group (reproduced below), he has derided Prof Valdiya's book and also ridiculed the 'link' between Buddhism and Indus civilization. Perhaps he is not aware of the Indus proof on Yogic meditation – a core concept of Hindu Dharma which Buddha practiced but later developed as a separate religion by his followers.
Given below is the image found in Mohanjadaro. A man is in a seated position with his left palm kept upwards and resting on the left lap and the right palm resting on the right lap with fingers stretched down.
The description in the above link just hovers around the head, the probable hair style and the dress of the figure. The writers could not think beyond that. Perhaps they also belong to the categories of Witzel-likes, and reject what Hinduism says as imagination. They do not seem to have any interest in knowing why a man should be seated in such a position and that it had to be carved by Indus artists. If they care to look for this posture, they would know that this is the penultimate posture for a Yogi engaged in Kundalini Yoga. This posture is called as Bhumi Sparsa mudra where the Yogi who has reached the "Enlightened" state, calls on the Mother Earth (Bhumi) to witness the enlightened state of the Yogi. The Yogi directs his right hand towards the earth while his left hand shows that he has gone up to the enlightened realm. Gauthama Buddha attained this level which is depicted in many places like the following.