Ranger robot breaks its own endurance record

On July 6th of last year, Cornell University’s Ranger robot set a world record for untethered legged robots – it walked 14.3 miles (23.01 km) in about 11 hours on a single charge, with no hands-on assistance. The record had previously been held by Boston Dynamics’ BigDog, when it walked 12.8 miles (20.6 km). Both of those achievements were eclipsed last Monday (May 2nd), however, when Ranger beat its own record by walking a whopping 40.5 miles (65.18 km) on a single charge.

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