An elephant's tusks develop from their incisors throughout their life. The tusks of an adult elephant can grow by 7 inches (17cm) per year. Ivory is used to find salt, water and roots, remove bushes, clear paths, Mystic Elephant Here he comes Shirt and is sometimes used in combat. In addition, they are also used to mark trees to establish an elephant's territory. The gestation period of elephants is 22 months – longer than any other land animal. A newborn baby weighs an average of 7 pounds (3.1 kg) while a newborn elephant can weigh up to 260 pounds (118 kg) and especially, newborn elephants can stand up immediately after birth.