Mammals of Australia introductions of placental mammals into Australian fauna were about (rats), several thousand years ago (dingo), and 200 years ago (many species); the last two were made by humans. Some claims were made about placental mammal fossils from the Eocene of Australia, called "Tingamarra". These claims are based on only one found tooth having some characteristic features of condylarth, and were discussed widely. But both the age and placental nature of these fossils were challenged by other researchers. Monotremes are mammals with a unique method of reproduction: they lay eggs instead of giving birth to live young. Two of the five
March Mammal Madness March Mammal Madness March Mammal Madness is an alternate March Madness tournament focusing on simulated combat between non-human mammals, instead of college basketball. The bracket is run by a team of evolutionary biologists, using science and probability to determine the outcomes of the fights. The goal of Mammal March Madness is to provide a fun and exciting way to spread scientific knowledge about the competing animals, as well as awareness for animal conservation. March Mammal Madness dates back to 2013, when founder Katie Hinde discovered a Buzzfeed Animal Madness bracket online. She was disappointed to find it only contained 16