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  • blacklemon.jpg

    Hundred year old lemon found in the British Archives. Many spies were caught because they used lemon juice.

    Credit:

    Kristie Macrakis

  • lab.jpg

    Women working in an SW detection lab.

    Credit:

    Kristie Macrakis

  • tooth.jpg

    Nickolay Hansen, pictured above, hid invisible ink in his tooth.

    Credit:

    Kristie Macrakis

In Arts, Culture & MediaLifestyle & BeliefSideways GlanceThe World in Words.

Tagged: Kristie Macrakisinvisible inkStasi.