Galapagos tortoise Ralph weighs more than 500 pounds, two year old youngster weighs about 8 pounds. They both enjoy a fresh salad together on a hot summer day at the Phoenix Zoo and the size difference is astonishing. <br /> <br />Be sure to check out more amazing animals at Phoenix Zoo! <br /> <br />The Galápagos tortoise or Galápagos giant tortoise (Chelonoidis nigra) is the largest living species of tortoise and the 14th-heaviest living reptile. Modern giant tortoises can weigh up to 250 kg; even larger versions, now extinct, roamed every continent except Antarctica and Australia into the Pleistocene (
