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#university of michigan
#shawn xu
#photoreceptors
#biology
#neat!
#appreciative reblogs
#informative reblogs
#elementary motion detectors
#fruit flies
#visual system
#photoreceptors
#neuroscience
#science
#alligator
#tapetum lucidum
#reflection
#red eye
#shine
#eyeshine
#animal
#wildlife
#photoreceptors
#science
#physiology
#biology
#the earth story
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