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In this Wednesday, Jan. 15, 2020, photo scientist and study director Jennifer Molignano uses an electronic pipette to prepare culture medium, a dark pink fluid that provides nutrition to living human skin tissue, as she sets up a demonstration of experiments at a MatTek Corporation lab, in Ashland, Mass. Molignano demonstrated experiments created to evaluate the effects of exposing living human skin tissues to commercially available skin care products, as well as an experiment to evaluate the effects of ultraviolet B rays, a simulation of exposing skin tissues to sunlight. (AP Photo/Steven Senne)

In this Wednesday, Jan. 15, 2020, photo scientist and study director Jennifer Molignano uses an electronic pipette to prepare culture medium, a dark pink fluid that provides nutrition to living human skin tissue, as she sets up a demonstration of experiments at a MatTek Corporation lab, in Ashland, Mass. Molignano demonstrated experiments created to evaluate the effects of exposing living human skin tissues to commercially available skin care products, as well as an experiment to evaluate the effects of ultraviolet B rays, a simulation of exposing skin tissues to sunlight. (AP Photo/Steven Senne)

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