Why is six scared of seven? Because seven, eight, nine. Jokes like this are only one example of the ways that we humans like to assign personality traits to the numbers that dictate our world. Today, we explore this seemingly universal tendency to create emotional associations with numbers.
Then, is tipping culturally determined? Freakonomics investigates the nuances of tipping in the United States with the help of Cornell professor Michael Lynn.
Plus, Botox is well known for freezing the faces of many a Hollywood starlet, but how about freezing out negative emotions? We hear from journalist Taffy Brodesser-Akner about how Botox is being used to treat depression.