A Starship Technologies robot drives through campus delivering food at Purdue University, Thursday, Sept. 12, 2019, in West Lafayette, Ind. For the past month, Purdue students have seen little robots making their way across campus, down sidewalks and across streets. They're white and cooler-sized, with six little wheels and a long pole with an orange flag alerting those around of their presence. (Nikos Frazier/Journal & Courier via AP)
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