Associate Professor Marcel Cardillo teaches and carries out research in the fields of macroevolution and macroecology: big-picture patterns of biodiversity and evolutionary history. This includes some very fundamental questions about the world’s biodiversity that are often – surprisingly – still unsolved scientific mysteries. For example: How many species are there on Earth? Why are there so many species in the tropics? Why are there 350,000 kinds of beetles but only two kinds of elephants?