Detecting the level of ripe with a credible method... "How old is the tomato that I kept into the fridge?" isn't a curiosity anymore. It would have been an appreciated improvement that to generate a portable gadget to detect freshness of vegetables before taking them into the pocket at greengrocers. It is on the way but yet to come.
http://newatlas.com/raman-spectrometer-tomato-ripeness/49443/
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