By Michael Franco Using a fluorescent protein from jellyfish, scientists from Northwestern University figure out what a fly had been experiencing hours earlier.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/4c10cf66/sc/32/l/0L0Scnet0N0Cnews0Cneuroscientists0Elight0Eup0Ea0Eflys0Ebrain0Eto0Esee0Einto0Ethe0Epast0C0Tftag0FCAD590Aa51e/story01.htm