Living in groups of around eight hundred, known as mobs, they inhabit anywhere a dependable water source can be reached (Source 1). There are about twenty million of them in Australia. They can thank their long hind legs for being part of the reason for this success, allowing them to travel at up to fifty-six kilometers per hour and jump amazing heights and distances. They can jump as high as two metres and as long as eight metres. According to Source 1, grasses, leaves, and other plants are their main source of food. Baby kangaroos, called joeys, live in their mother’s pouch until they reach the age of ten months. Soon after giving birth, the mothers will breed again. But after just one week of development, while still invisible to human eyes, the joey enters a phase where it becomes dormant. Once the other joey has left the mother’s pouch, the embryo will resume development that lasts thirty days. These are some very unique adaptations that are a necessity to the survival of the kangaroo