Tardigrade Tattoos Could Pave the Way for Microscopic Medical Devices

Learn about the significance of tardigrades being tattooed, a process that could lay the foundation for microscopic, biocompatible devices.

By Jack Knudson
Apr 23, 2025 8:45 PMApr 23, 2025 8:39 PM
Tardigrade tattoos
This tardigrade is sporting a new “tattoo” — represented in this magnified image by the highlighted dots, and visible in the inset image. (Image Credit: Adapted from Nano Letters 2025, DOI: 10.1021/acs.nanolett.5c00378)

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Tardigrades take extreme living to another level, thriving in the toughest conditions. These animals (nicknamed “water bears” for their rotund figure) live practically everywhere and can endure any ordeal thrown their way, from subzero temperatures to cosmic radiation. This unparalleled durability is what makes them the perfect candidate for microscopic tattoos, as shown in a new study published in the American Chemical Society’s Nano Letters.

In this study, researchers have revealed a way for tardigrades to be tattooed, but not just for style points. The tiny tattoos given to the creatures were meant to test a procedure that could create micro- and nanoscale devices for living matter, a crucial advancement for biomedical fields.


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