Q&A: How an assistive-feeding robot went from picking up fruit salads to whole meals

According to data from 2010, around 1.8 million people in the U.S. can't eat on their own. Yet training a robot to feed people presents an array of challenges for researchers. Foods come in a nearly endless variety of shapes and states (liquid, solid, gelatinous), and each person has a unique set of needs and preferences.