An adult male red kangaroo is taller than most people. It can stand up to 7 feet (2.1 m) tall and weigh up to 205 pounds (93 kg), which makes it the world's largest marsupial. Despite the fact that it grows to such a big size, a newborn red kangaroo is tiny. The joey is about one inch (2.5 cm) long, or the size of a grape. It's hard to believe that such a little baby will grow up to be a king-sized kangaroo In Red Kangaroo: The World's Largest Marsupial,...