A simple yet important question is answered in today's build challenge recap! Christmas and the holiday season in general are ...

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Abstract: Mobile robots operating in multi-story buildings require some way to effectively and reliably switch between floors. The existing elevator systems present in many buildings offer a ...

Five people were rescued from an elevator at 60 State St. in Boston on Monday night, fire officials said. Boston Deputy Fire Chief James Greene described the rescue operation in an interview with CBS ...