From Google video:
"Gary Taubes, an award-winning writer for Science, the New York Times Magazine and other publications, came to Stevens to discuss his controversial new bestseller, Good Calories, Bad Calories which argues that much of what we have been told about the relationship between body weight, diet and exercise is wrong."
This video is so full of awesome science it will blow you away.
tl;dw (too long; didn't watch): Insulin is needed for your body to store fat in fat cells. Insulin is released when eating carbohydrates. No carbs = almost no fat is stored.