Why are there 7 years in a dog year?

What is our water carbon footprint? Does microwaving food destroy the nutritional value? Why do golf balls have dimples? Should we be desalinating water? Why are breastfed babies less likely to become obese? How did we calculate a dog year? Why do we always look at something that we're told not to? What is intermittent fasting? Dr Chris Smith and Clarence Ford have all the answers...