How hot can you handle? People have been eating spicy foods since pre-history, and to this day, millions of people all over the world still enjoy a hot-kick during meals. But what exactly makes a food spicy? Why do some spices (like wasabi or mustard) burn your nose, while others (like chili peppers) burn your mouth? What is the hottest pepper in the world? What is the science behind spiciness? To learn more, watch the video below. Enjoy!