Indians started cultivating rice (~ 2000 B.C.) much later than the Chinese (~ 4000 B.C.) [1]. Given the rate at which lactose tolerance spread in Europe, Indian

Indians started cultivating rice (~ 2000 B.C.) much later than the Chinese (~ 4000 B.C.) [1]. Given the rate at which lactose tolerance spread in Europe, Indians had already developed lactose tolerance by the time they started cultivating rice. [1]: http://sourcing.indiamart.com/agriculture/articles/origin-and-history-rice-india/ http://sourcing.indiamart.com/agriculture/articles/origin-an...