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A Billionaire-Backed Startup Wants to Grow ‘Organ Sacks’ to Replace Animal Testing

todayMarch 23, 2026 7

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 R3 Bio has a bold idea for replacing lab animals: genetically-engineered whole organ systems that lack a brain. The long-term goal, says a cofounder, is to make human versions.

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​Science, Science / Biotech, Body Doubles 

Written by: ccolesx10

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