And try to have good “sleep hygiene” by going to bed and waking at consistent times, having a bedtime routine, keeping your room dark and keeping your phone away from your bed. 3. Get moving.

What happens when good genes go bad? What kinds of mutations create "lethal genes," and how are they passed on? Lethal genes can be recessive, as in the aforementioned mouse experiments.

Whether people live long lives depends more on their lifestyle and environment than on their genes, new research shows. (Getty Images) ...

If you have a parent or grandparent who’s reached their 90s or even become a centenarian, someone’s probably said to you, “Oh, you have good genes!” But if longevity doesn’t seem to run ...