How severe are the symptoms and how long do they last? How long the symptoms last and how severe they are depend on your lifestyle before making a change and how quickly you make a change. If you have a diet heavy in red meats, for example, and become a vegetarian overnight, you might have severe symptoms for a time.
The largest officially registered walleye ever caught had a length of 35 inches and had a circumference of 23 inches. The fish weighed 19.3 pounds.
Largest Eye in the World, Giant Squid Giant squid have the largest eye in the animal kingdom. At up to 10 inches in diameter, people often describe it as the size of a dinner plate -- or, in other words, as big as a human head. Here, National Museum of Natural History staffer Katie Velazco goes eye-to-eye with a preserved example from the Smithsonian\'s collection.