A Lizard Robot to Delight You and/or Haunt Your Dreams

Researchers are finding ways to build robots that run on sand.

If imitation is the sincerest form of flattery, then the natural world should be positively humbled by the current state of robotics. We have flying robots that mimic birds. We have leaping robots that mimic fleas. We have robots that mimic cheetahs and horses and snakes, making themselves at home within and upon all manner of surfaces.

One thing we've had a little less success in replicating, though, are the lightweight creatures that scamper over liquid-like surfaces like snow (and mud, and sandy beaches, and leafy piles, and pebble-y paths). The technical term for these slippery surfaces is "granular media" (or, even more technically, "flowable ground") -- and they've represented a significant challenge to would-be designers of automata. Walking on sand or snow requires a certain level of flexibility from the walker in question -- the kind human muscles are great at achieving, and the kind that's nearly impossible to achieve when your feet are made of metal or plastic. As a result, it's been especially difficult to build robots that are suited to traveling on terra sorta-firma.

Enter Chen Li, Tingnan Zhang, and Daniel Goldman -- a trio who, today, announced their development of "a resistive force model that predicts forces on arbitrary-shaped legs and bodies moving freely in granular media in the vertical plane." Which is another way of saying, as Discovery Magazine puts it: They've created a model that is "a crucial first step of building a sand-walking robot."

The robot they've built to test their model mimics a lizard, and is based on the team's study of lizard legs as they flail over desert landscapes. The resulting pseudo-reptile has six legs, and can reach a maximum speed of a little more than two feet per second -- which is impressive. Until, that is, you run into it at the beach.

Megan Garber is a staff writer at The Atlantic.

Our Incredible, Microscopic World

Highlights from Nikon's Small World in Motion competition, featuring zebrafish embryos, killer T cells attacking cancer, and much more

Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register with Disqus.

Please note that The Atlantic's account system is separate from our commenting system. To log in or register with The Atlantic, use the Sign In button at the top of every page.

blog comments powered by Disqus

Video

The Horrors of Rat Hole Mining

"The river was our source of water. Now, the people won't touch it."

Video

What's Your Favorite Slang Word?

From "swag" to "on fleek," tweens choose.

Video

Cryotherapy's Dubious Appeal

James Hamblin tries a questionable medical treatment.

Video

Confessions of Moms Around the World

In Europe, mothers get maternity leave, discounted daycare, and flexible working hours.

Video

How Do Trees Know When It's Spring?

The science behind beautiful seasonal blooming

More in Video

Just In