Skip to main content

Need an adhesive in outer space? Look to the gecko

nasa robotic arm international space station
Naeblys / Shutterstock
Mother knows best, and Mother Nature knows best of all. So of course, when it comes to exploring the natural wonders beyond Earth, scientists are now discovering that the best lessons are to be learned from some of the smallest creatures on the planet – in this case, the gecko. In NASA’s quest to build robots capable of scaling the walls of the International Space Station, scientists are taking inspiration from gecko feet, and are developing a “gecko gripper” system that will take adhesion to the next level.

Whereas the substances we use here on Earth to stick things together (think glue, tape, and Velcro), may serve their terrestrial purposes, extra-terrestrial adhesives need to be a bit more advanced. Velcro has previously been used as a binding method, but the problem is that it requires a “mating surface.” But technology inspired by geckos work differently. These lizards don’t have sticky substances on the bottom of their feet – rather, they are lined with countless tiny hairs, which create van der Waals forces between themselves and the climbing surface.

As a related NASA statement explains, “A slight electrical field is created because electrons orbiting the nuclei of atoms are not evenly spaced, so there are positive and negative sides to a neutral molecule. The positively charged part of a molecule attracts the negatively charged part of its neighbor, resulting in ‘stickiness.’”

Best of all, van der Waals forces are present regardless of environment, meaning that temperature, pressure, and radiation have little to no effect on their effectiveness.

NASA is now creating a material that applies the same concept, lined with tiny, thin synthetic hairs. In testing, Wired UK reports, the technology was “able to stick to and manipulate a 10 kilogram cube and a 100 kilogram person.” The agency has now conducted over 30,000 tests with the material, each of which has proven effective. Aaron Parness of NASA’s Jet Propulsion Laboratory noted that with this new technology, “We might eventually grab satellites to repair them, service them, and we also could grab space garbage and try to clear it out of the way.”

All thanks to the gecko.

Editors' Recommendations

Lulu Chang
Former Digital Trends Contributor
Fascinated by the effects of technology on human interaction, Lulu believes that if her parents can use your new app…
How to watch SpaceX Crew-8 launch to the space station tonight
SpaceX's Crew-8 ahead of launch.

NASA Live: Official Stream of NASA TV

UPDATE: NASA and SpaceX had been targeting early Saturday for the Crew 8 launch, but a forecast of strong winds in the ascent corridor prompted the mission team to switch to a new targeted launch time of 10:53 p.m. ET (7:53 p.m. PT) on Sunday, March 3. The article below has been updated to reflect this change. 

Read more
NASA astronauts need good weather for Crew-8 launch. Here’s how it’s looking
A SpaceX Falcon 9 rocket during a static fire test.

UPDATE: SpaceX and NASA are now targeting 11:16 p.m. ET on Saturday, March 2 for the launch of Crew-8.

SpaceX is preparing to launch three NASA astronauts and one Roscosmos cosmonaut to the International Space Station (ISS).

Read more
Thunderstorm from space captured in dramatic video from ISS
A storm seen from the International Space Station in 2024.

Private astronaut Marcus Wandt has shared a dramatic video captured from the International Space Station (ISS) showing a thunderstorm from above.

The footage (below) shows numerous flashes among clouds in what looks to have been a ferocious storm.

Read more