Did Krishna really exist?

Was Krishna real or not.  Did he walk this earth?  Well some people are doing some research and here is an interesting video based on research on one guy – Prof Achar.

ALso read through the detailed research articles by another person, Mr. Ramesh Panchwagh, which differ slightly from Prof. Achar’s work, but in many dates they are same.

Astronomical Proof of the Mahabharata War and Shri Krishna: Part I
Astronomical Proof of the Mahabharata War and Shri Krishna: Part II