Golden rice: The natural varieties of rice do not provide vitamin A. Vitamin A deficiency, as you may already know, could lead to blindness, decreased immunity to diseases and deaths of more than a million children. So, the scientists in Switzerland genetically enhanced rice to be rich in p-carotene (a precursor of vitamin A, to be converted to vitamin A in the body) by re-engineering the genes that imparts yellow colour to daffodils. Interesting isn't it!