Boston Dynamics rose to fame with its four-legged cargo robot Big Dog, (also captured in a YouTube sensation here) which shows an uncannily life-like ability to walk over terrain and recover its footing even when it slips or is kicked.
He walked 1, 028km (640 miles) in 20 days from east to west Nepal and the following year he trekked about 300km from north to south in nine days -- a tougher walk because of mountainous terrain.
Climbing the six Abels in the brutal Western Arthurs Range, located inside the World Heritage-listed Tasmanian Wilderness Area that covers 20% of the island, necessitates a walk through such difficult mountain terrain that it can take walkers up to two weeks to hike what is often described as the most difficult bushwalk in Australia.