The Pulsating Spider
November 12, 2016 10:17 PM Subscribe
The mystery of the pulsating spider : "During my years in the field, I had recorded numerous instances of micro-movements in spider abdomens. While most are just really tiny unnoticeable movements on the spider's heart line, one particular spider stood out with swirling or pulsating movements in the abdomen and visible with the naked eye."
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