On either side of a gorge high in the Peruvian Andes, an aging rope bridge sags precariously over the Apurímac River. 1 of 13 A Quechua man walks across the old suspension bridge at the start of ...

To perform the task of bridge-building, the drones are fitted with a motorised spool of rope. This allows the drone to control the rope's tension as they unspool it, guided by a plastic tube to a ...

Watch Two Drones Build A Rope Bridge Published Sep 23, 2015 at 12:16 PM EDT Updated Apr 20, 2016 at 4:15 PM EDT ...

The rarest primate on Earth is in danger. A rope bridge could help it survive The Hainan gibbon faces a high threat of extinction, and conservationists want to reverse the trajectory.

Enter the rope bridge. It took months for the gibbons to catch on, but about 176 days after the bridge’s installation, camera traps captured the gibbons taking to the ropes.