but is there some way of making an arduino robot actively search for water
How do the Mars rovers do it?
Baby sea turtles after hatching immediate head for open water even if they cannot see it.
Maybe they just hear the noise or follow the slope of the beach (I'm just guessing, no biologist)
QuoteMaybe they just hear the noise or follow the slope of the beach (I'm just guessing, no biologist)They cross dunes that block the view and are just as adept when the ocean is quite. Note that crossing a dune means going uphill first. A team of biologists equipped some turtle babies with goggles that block polarization. They became disoriented. Plain glass goggles had no such effect.
How would we detect polarization with an Arduino. Perhaps a servo, a piece of polarized film and a light sensor?