Scientists have found evidence of what they called an ‘Age of Monotremes’ some 100 million years ago in Australia, according to research published on Monday. Research by a team of Australian scientists described six species of monotremes, including three new ones, all living in the same area of New South Wales. The three newly described species are from opalized jaws found in the Lightning Ridge opal fields on the Queensland-New South Wales border dating back to the Cenomanian Age of the Cretaceous Period, between 102 million to 96.6 million years ago. Monotremes are egg laying mammals. Austra…