Chen Xingzhi had to wait till her retirement to follow up on her dream "job."

The 74-year-old Shanghai resident has turned her childhood hobby of making sachets – in this case, scented sachets – into a successful business venture today.

"I had never considered running a business before retiring, but my hobby has now become my family business," said Chen, who has roped in her son to help her as her early efforts showed promise.

— Read more in The sweet scent of sachets is keeping a tradition alive at Shine.

Retronasal olfaction can heavily influence how something tastes. In experiments, Katz says that changing the scent someone inhales while eating can change how they perceive the flavor, even if the stuff in their mouth is otherwise exactly the same. But while scent is a huge part of taste, it is not a replacement for it.

“Smell changes taste, but taste isn't just whatever smell tells it,” Katz says. “You can stuff as much raspberry up your nose as you want, that's not going to make you taste raspberry.”

— Wired does not like the Air Up water bottle (remember those?); read more in Review: The Air Up Water Bottle.