The football world just held it's biggest event, and even if you're not a fan, you likely tuned in for Super Bowl 59.

A concussion is a mild traumatic brain injury caused by a sudden hit, jolt, or impact on the head or body, leading to rapid movement of the brain inside the skull.

The letter came after trustees had criticized the firing of football coach Mack Brown followed by involvement in the hiring of six-time Super Bowl-winning head coach Bill Belichick as Brown’s ...