An illustration of ReachBot

A Robot Built to Explore Caves and Cliffs on Mars

This robot could take humankind to never-before-explored places on Mars.


Mars, with its hidden caves and towering cliffs, has always posed a challenge to conventional rovers. These uncharted territories could hold the secrets to Martian life. Stanford’s latest innovation, ReachBot, aims to unveil these secrets where traditional rovers dare not tread. The goal is simple; a specific type of robot will be built that will explore the caves and cliffs on Mars, taking humankind to never-before-explored places on the red planet.

Bridging the gap between advanced robotics and space deployment structures, ReachBot represents the zenith of Stanford’s creative genius. Originating as a proposal for NASA’s Institute for Advanced Concepts, it was honored with a Phase I grant in 2021.

Drawing from the Best of Two Worlds

While mobile manipulation robots like Robonaut and LEMUR have been pivotal in space maintenance tasks, their movement capabilities remain constrained, especially in areas like cliff faces. Conversely, deployable structures have revolutionized the way satellites utilize space—efficiently packing critical components like solar panels.

ReachBot’s brilliance is in marrying these two technologies. With deployable structures as its limbs, it’s engineered to maneuver complex landscapes with grace.


Rock-Climbing Analogy: Always Three Points of Contact

Rock climbers swear by maintaining “three points of contact” for stability. ReachBot adopts this philosophy. By maneuvering one limb at a time, it ensures stability, whether traversing a cliff’s face or navigating the rugged floors of Martian caves.

Not just a climber, ReachBot’s design enables surface operations like drilling. Its ability to exert force and stabilize itself using its limbs allows it to perform tasks conventional rovers find challenging.

The Road Ahead for ReachBot

With significant strides already taken, including the development of a controller and exploration of end-effector solutions, Stanford’s team shows promise. Their ambitious plans point to real-world testing that mimics the Martian environment.


Post the conclusion of the Phase I project, the journey of ReachBot is far from over. While the anticipation of a Phase II project builds, the potential of ReachBot on Earth cannot be ignored. Its adaptability and prowess assure that its technological journey will continue to flourish.

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Written by Ivan Petricevic

I've been writing passionately about ancient civilizations, history, alien life, and various other subjects for more than eight years. You may have seen me appear on Discovery Channel's What On Earth series, History Channel's Ancient Aliens, and Gaia's Ancient Civilizations among others.

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