Tethys is a device that discovers lead contamination in water, an innovation that can be used across countries.

Indian American teen innovator Gitanjali Rao explains how she made Tethys, a device that detects lead contamination in water and sends that information over Bluetooth. Rao was TIME’s first year ever Kid of the Year for 2020.

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EXCLUSIVE: Scientist, innovator, TEDx speaker, trainee pilot – how teenage prodigy Gitanjali Rao is raising the bar
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