Night snacks may pack pounds

When you eat, not just what you eat, can affect your weight, a new study on mice suggests.

Mice that were fed a high-fat diet during the time they'd normally eat — the regular hours in their daily circadian cycle — gained 20 percent in weight over six weeks. But mice fed the same high-fat diet during hours they should have been sleeping put on 48 percent compared to the weight they started with.

While the results would have to be replicated on humans to see if the effects are the same, researchers suspect they are.