Jasjit Kaur Singh, an Indian chef, cooks kaala channa, a traditional spicy Sikh dish. A psychologist says that children who grow up in cultures with lots of spicy food are taught to like spice early on. Richard Lautens/Toronto Star via Getty Images hide caption

itoggle caption Richard Lautens/Toronto Star via Getty Images

Prehistoric Deer Stew? A fragment of pottery found in Neustadt, Germany, is coated in the microscopic remains of crushed mustard seeds and roasted fish and ruminant meat, possibly deer. This shard dates back to about 5,900 years ago. Courtesy of University of York, BioArch hide caption

itoggle caption Courtesy of University of York, BioArch