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A new test can detect your blood type with color-changing paper https://t.co/g9eHRJ94g8 https://t.co/AH577enbwT

PopSci: A new test can detect your blood type with color-changing paper https://t.co/g9eHRJ94g8 https://t.co/AH577enbwT - 2017-03-19 20:00:06