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American Focus > Blog > Tech and Science > Salamanders fill their toes with blood to release sticky grip
Tech and Science

Salamanders fill their toes with blood to release sticky grip

Last updated: February 1, 2025 1:36 am
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The Mystery of Salamanders’ Blood-Filled Toes Unveiled

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

The translucent toes of a wandering salamander

William P. Goldenberg

How salamanders manage to move around on uneven, vertical tree surfaces with such dexterity has long baffled scientists. A new discovery suggests they use a trick out of a horror movie: filling their toes with pools of blood.

While Christian Brown at Washington State University was observing wandering salamanders (Aneides vagrans) through a close-up camera in 2021 in a coastal redwood forest, he noticed blood moving in a rhythmic pattern under their translucent skin. Before lifting their foot to take a step, blood inundated the tips of the salamanders’ toes, providing a possible explanation for their remarkable grip and agility.

This unique adaptation allows salamanders to create a suction-like effect between their toes and the surface they are navigating, enhancing their ability to cling onto various terrains. The rhythmic flow of blood not only aids in grip but also helps in maintaining the flexibility and sensitivity of their toes, crucial for precise movements.

Further research is needed to fully understand the biomechanics and physiological advantages of this blood-filled toe mechanism in salamanders. Studying these fascinating creatures could potentially inspire advancements in robotics and materials science, drawing from nature’s own solutions for efficient locomotion and adhesion.

See also  A Blockbuster ‘Muon Anomaly’ May Have Just Disappeared
TAGGED:bloodFillGripReleaseSalamandersstickytoes
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