The Evolution of Flavor: How It Made Us Human

Some blood pressure drugs have been recalled because of contamination with nitrosamines. A new study analyzed data from 15 randomized controlled trials including nearly 140,000 patients. What flavors do you crave? Do you have a sweet tooth or do you prefer salty things? How much did flavor matter to our hominid ancestors? Dr. Rob Dunn is an ecologist and evolutionary biologist who focuses on the biodiversity of humans.