You need to identify the steps at which contamination can occur - those are the critical control points. You take steps to make sure that that doesn't happen. And you monitor and evaluate and test to make sure that your system is working properly. And if it's done diligently and done faithfully and monitored carefully, then they're producing safe food. And no astronaut of which I'm aware has ever gotten food poisoning in outer space.

One can only be in awe of the creativity of chocolate marketers. My take is that if there is a health benefit, it is small.

Eat less, move more, eat lots of fruits and vegetables, go easy on junk foods.

Consumers have to understand that the purpose of these claims is to get them to buy the product.

The key dietary messages are stunningly simple: Eat less, move more, eat more fruits and vegetables, and don't eat too much junk food. It's no more complicated than that.

These days the biggest issue is how many calories you consume. So all of this stuff distracts people from thinking about calories.

Unbelievable as it may seem, one-third of all vegetables consumed in the United States come from just three sources: french fries, potato chips, and iceberg lettuce.