This smoke system brands intruders with <a href="https://www.popsci.com/category/best-whats-new/"><strong>harmless, unique plant DNA tags</strong></a> to prove they were at the scene.
This smoke system brands intruders with harmless, unique plant DNA tags to prove they were at the scene. Courtesy Applied DNA Sciences
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For years, “security smoke” has saved valuables but failed to catch bad guys. A new indelible (and harmless) tag on skin and clothes could help.

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