1. A giant fossilized claw found from an ancient sea scorpion indicates that when alive, it would have been much taller than the average man. This find, from rocks 390 million years old, suggests that spiders, insects, crabs and similar creatures were much larger in the past than previously thought.

2. Skin cancer is 20 percent more common on the left side of the body.

3. Men who have only daughters have a higher risk of prostate cancer than men with at least one son, suggesting a chromosome defect.

4. Baking pizza dough at higher temperatures for longer periods enhances levels of antioxidants that researchers believe reduce a person's risk of developing cancer and heart disease.

5. Scientists have discovered dark chocolate contains more antioxidants than red wine.

6. People who are optimists do better in most avenues of life, whether it's work, school, sports or relationships. They get depressed less often than pessimists do, make more money and have happier marriages.