Bees make honey by gathering nectar from flowers. They mix the nectar with enzymes in their stomach-like honey sac. Back at the hive, the foragers pass the digested material to house bees who reduce the moisture content of the mixture by ingesting and regurgitating it. They then deposit concentrated drops into honeycomb cells. Over the next few days, bees fan the fluid with their wings to further concentrate it, and finally, they cap the cells with wax.
From Chemical and Engineering News.