Injectable goo could fix joints without surgery, early study suggests

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Scientists have invented an injectable "goo" that can regrow cartilage in the body. For now, they've only tested it in sheep, but it could someday be used to repair joint damage in humans, the researchers say.

In particular, they hope the goo can treat damage caused by degenerative diseases, such as osteoarthritis, and sports-related injuries, including anterior cruciate ligament (ACL) tears.