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Just glancing at a photo of a rich and gooey chocolate cake can set your brain circuits sparking, switching on cravings and revving up your appetite, a new study shows.

The initial fare at TEDMED 2012 whet my appetite for the sessions that followed.

When your stomach’s empty, it pumps out the hormone ghrelin, to whet your appetite and get your juices flowing. But ghrelin doesn’t just make you crave a bite. It helps you track it down too--by sharpening your sense of smell.

Many of us eat lunch parked in front of a computer, but that habit might be boosting our appetite for dessert, a small study suggests.