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Jul 16, 2009 04:10 PM | 4
What slithers like a snake, swims like a fish and lives in the Sahara? The sandfish lizard, of course. This small reptile, which measures just 10 centimeters long, can swim through the sand dunes at up to 15 centimeters per second. But how does it do it?
Researchers at the Georgia Institute of Technology used a high-speed x-ray camera to peer through the sand and see. The little lizards, it turns out, use a far different mode of locomotion under the sand than they do at the surface.
“Once below the surface they no longer use their limbs for propulsion," study leader Daniel Goldman said in a statement. “Instead they move forward by propagating a traveling wave down their bodies like a snake.”
The lizard’s swimming style also helped Goldman and his team understand the physics behind movement in different types of grainy substances—findings that could provide lessons for engineers looking to build robots that can make their way through a variety of materials.
Watch video of the lizard swimming through sand below.
Image courtesy of Ryan Maladen/Lionel London
Tags:
lizards,
biomechanics
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4 Comments
Add CommentCoolest thing i've seen on here yet.
Reply | Report Abuse | Link to thisWow, the movement in dense materials, such as sand, seems to be energy-devouring.
Reply | Report Abuse | Link to thisFrank Herbert's sandworms of Dune live on earth!
Reply | Report Abuse | Link to thisthe video does not work for me. it says it is unavalible
Reply | Report Abuse | Link to this