Although it may look like an art project, these researchers from the University of Exeter are actually trying to track the movements of snails that carry lungworm parasites--a deadly menace to dogs in the UK. So they placed LEDs and UV paint on the snails. Skip to 2:49 in the video to see the snails in action.
-via Colossal
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Good points, Daniel.
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There is too much intervention during the experiment. Snails are sensitive to light, and so having people use flashlights on them during the night would change their behavior. Also, I don't know if snails are blind to ultraviolet light. If they are not, then their behavior will be quite atypical during the experiment. It is well known that the location of a snail or its velocity may be determined, but not both.
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