Do you have a child or grandchild who has been diagnosed with attention-deficit/hyperactivity disorder (ADHD)?

You probably know about telomeres by now. Animal studies are very convincing that telomere length can determine how long the animal lives. As I’ve shown you multiple times, this is true for humans as well.

You’ve heard of jet lag. But have you heard of social jet lag? Jet lag refers to a sudden change in sleep hours after traveling across time zones. Social jet lag refers to going to bed later and waking up later on weekends than on weekdays.