1500 years ago, Mantai was a bustling port where merchants traded their era’s most valuable commodities. Now, a study of ancient plant remains reveals traders from all corners of the world—including the Roman Empire—may have visited or even lived there... During that time, it would have been a nexus for the spice trade, which ferried Indonesian cloves and Indian peppercorns to Middle Eastern and Roman kitchens...“Because [spices] are so valuable, people in the past really made sure they didn’t lose them or burn them,” Kingwell-Banham says. “These things were worth more than gold.” The clove, in particular, must have made...