In 1983, the first genetically engineered organism, a tobacco plant designed to be resistant to certain herbicides, was grown in Wisconson.

Our liver doesn't just filter toxins from the blood. In fact, it is thought to be responsible for more than 500 separate functions, usually in combination with other systems and organs.

Of these animals, the Freshwater Oyster has the longest recorded life span at 80 years. The longest recorded life span for a termite is 50 years; for a chimapanzee, 50 years; and for an Indian elephant, 70 years.

Since teeth are made of enamel, which contains a very high percentage of inorganic material, they cannot regenerate.

The orange is not a wild fruit, having arisen in domestication from a cross between a non-pure mandarin orange and a hybrid pomelo that had a substantial mandarin component.