It finished the 21.1-kilometer race in 50 minutes and 26 seconds. The world record was set just a month ago by Jacob Kiplimo, at 57 minutes and 20 seconds. More impressively, when this race was held last year, the winning robot finished in 2 hours, 40 minutes — a stunning improvement.
Correction April 19th: An earlier version used the wrong unit of measurement. A half-marathon is 21.1 kilometers, or 13.1 miles.











































