A Billionaire-Backed Startup Wants to Grow 'Organ Sacks' to Replace Animal Testing
- Posted on March 23, 2026
- By Wired
- 3 Views
A Billionaire-Backed Startup Wants to Grow 'Organ Sacks' to Replace Animal Testing
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.
