Anand Mishra is not the kind of guide we often meet at the historical sites of our country. Conversant in English, knowledgeable about his job, punctual, and eager to learn from whatever sources, Anand perhaps reflects the spirit of the much-talked about new, small-town India. To top it all, he has a fellowship from NASA. More than what you expect in a sleepy, dusty, village-town of Lonar in central Maharashtra.   But then Lonar is not just a historical place. Far removed from the typical tourist circuits and itineraries, Lonar is a place where history, geology, astronomy, ecology, and mythology…