Several years ago, a rare specimen washed up on a beach in Cornwall, England: A 100 year-old Greenland Shark. Even at a century old, this shark would still be considered a juvenile. These Arctic-dwelling predators don’t reach full adulthood until 150 years of age. They grow up to 25 feet long and eat anything they can get from fish to seals to moose if given the chance. Female Greenland sharks gestate for between 8 and 18 years before giving birth to live young. But Greenland sharks are most well known for their long lifespans; the oldest specimen captured was…