How Dung beetle Inspired Polarized-light Navigation
Scarabaeus satyrus · Animal · Sub-Saharan African savanna
What if the solution to navigation by light polarization had already been perfected — by a dung beetle over 50 million years of evolution?
The Natural Innovation
On dark, cloudy nights when stars are invisible, the dung beetle navigates in a straight line by detecting the faint polarization pattern of the Milky Way — the only animal known to use the galaxy for navigation. This prevents it from circling back and losing its dung ball to competitors.
The dung beetle lives in Sub-Saharan African savanna.
In the language of biomimicry, this falls under the Sense › Navigate using light polarization category.
The Design Principle
Detecting the polarization pattern of scattered light (from the sun, moon, or Milky Way) provides a global directional reference that is available even on overcast nights and in GPS-denied environments.
Human Applications
Compact polarized-light navigation sensors for autonomous vehicles and robots that need to navigate without GPS — particularly in featureless open environments or GPS-denied areas.
Real-world implementations include: Desert locust-inspired polarization compass (University of Edinburgh), polarimetric navigation for AUVs.
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Detecting the polarization pattern of scattered light (from the sun, moon, or Milky Way) provides a global directional reference that is available even on overcast nights and in GPS-denied environments.
Source: AskNature.org
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