In 1879, a French surgeon postulated that a yet-undocumented ligament existed in the human knee. More than 130 years later, two Belgian physicians finally found it: the anterolateral ligament, or the ALL. Functioning as a stabilizer, ALL failures are actually a large reason for ACL tears in pivot-heavy sports like soccer, basketball and football. That’s big news, but it will still be years before surgeons figure out how ALL repairs can shorten recovery times. So if Derrick Rose goes down in a heap on the basketball court again before 2025, don’t expect a quick fix.