Rhonda Patrick· PhD
Uh, there's a physician we we work with um who is president of the knee society for ACL's. And when a kid would tear his ACL or her ACL in the 80s and 90s um they pull out this big drill, drill into the cortical bone, it's very intense. The bones are very hard. Now they just core the bone by hand. They just hand turn the drill because the bones are so soft.