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6. Galápagos Tortoise
Ever wondered why Galápagos tortoises are so famous? Well, Spanish explorers in the 16th century stumbled upon the Galápagos Islands (which are now part of Ecuador) and were amazed to find these massive tortoises roaming around. These gentle giants can weigh over 900 pounds and live for 170 years or more! In fact, some tortoises alive today were around during the time of Charles Darwin!