Robot Janitors Are Coming to Mop Floors at a Walmart Near You

https://www.bloomberg.com/news/articles/2018-12-03/robot-janitors-are-coming-to-mop-floors-at-a-walmart-near-you?utm_source=MIT+Technology+Review&utm_campaign=a092ed8f7e-EMAIL_CAMPAIGN_2018_12_04_12_43&utm_medium=email&utm_term=0_997ed6f472-a092ed8f7e-153856085