The N.F.L. claims Guardian Caps reduce the risk of concussions. The company that makes them says, “It has nothing to do with concussions.”

Each year, about two million children, many while playing organized sports, suffer concussions. But, according to concussions researcher Jaclyn Stephens, an occupational therapist and associate professor in the Department of Health and Exercise Science at Colorado State University, parents and coaches don’t always know how to recognize and respond to them.

Stephens teamed up with other experts around the world to issue an easy guide on concussions.

For me, the biggest takeaway was simple. For the first time in a long time, I felt hopeful. That alone made it easier to keep going.

A study led by FifPro has found female footballers suffering from concussion on at least three occasions performed "significantly worse" in tasks requiring attention.

When a senior coroner declared on Monday that repeatedly heading footballs is "likely" to have contributed to the brain disease which was a factor in the death of former Leeds United and Manchester United defender Gordon McQueen, the relationship between heading and neurodegenerative illnesses was thrust into the spotlight again.

Beyond its monsters and 1980s nostalgia, Stranger Things resonates because it tells stories of struggles familiar to young people: trauma that lingers, identity that wavers, and friendships that buffer against fear.

And by turning inner struggles into visible monsters, Stranger Things can provide a lens to discuss trauma, identity and resilience.

Here are some of Stranger Things’ insights into adolescent development and mental health – and how adults can use the show to talk to teenagers about their own mental health.

Veterans keep fighting long after the uniform comes off. Some battles unfold in families, careers and friendships. Others stay locked inside the mind.

Sheepdog, a new independent film, brings those unseen struggles into the open and refuses to leave them there.

• Evangeline Lilly says much of her brain is “functioning at a decreased capacity” after her traumatic brain injury last year.
• Lilly suffered a concussion when she fell after fainting and hit her head on a boulder at a beach.