13 comics use 'science' to hilariously illustrate the frustrations of parenting.

"Newton's First Law of Parenting: A child at rest will remain at rest ... until you need your iPad back."

Norine Dworkin-McDaniel's son came home from school one day talking about Newton's first law of motion.

He had just learned it at school, her son explained as they sat around the dinner table one night. It was the idea that "an object at rest will remain at rest until acted on by an external force."

"It struck me that it sounded an awful lot like him and his video games," she joked.

A writer by trade and always quick to turn a phrase, Norine grabbed a pen and scribbled some words:

"Newton's First Law of Parenting: A child at rest will remain at rest ... until you need your iPad back."

And just like that, she started creating "The Science of Parenthood," a series that names and identifies hilarious, universal parenting struggles. She put in a quick call to her friend Jessica Ziegler, a visual and graphics expert, and together the two set out to bring the project to life.

Longevity test: If you can hang from a bar this long, you’re likely to live longer

Hang time is a great measurement of overall health.

Would you really want to know how long you have to live? On one hand, it’d probably inspire you to go out and complete your bucket list. On the other, it may be depressing to know just how many days you have left.

Well, science has yet to discover a way to determine the average person's life expectancy. However, some indicators can show whether someone is in danger of having their life cut short by deteriorating health.

A study published by Clinical Interventions in Aging in 2019 determined that handgrip strength can be a reliable proxy for how long one has to live. One of the best ways to judge handgrip strength is to time how long you can hang from a bar. To test your grip strength, find yourself a pull-up bar, whether at a gym or local park, take a deep breath and start hanging.

Psychologist shares 15-second trick to make kids of any age less rude and more cooperative

All it takes is a single question.

Sometimes, it can feel like half of parenting is repeating yourself over and over again, asking your child to brush their teeth or take a dish from the living room to the sink. It’s exhausting and makes you feel like a nag. Don't you wish there was a simple way to make your kids listen the first time?

Dr. Rebecca Kennedy, aka “Dr. Becky,” is a clinical psychologist and founder and CEO of Good Inside who says she has a quick way to make your kids more cooperative and less rude. Talk about killing two soul-crushing birds with one parenting stone.

'Sleep training' is a heated debate in the parenting world. It shouldn't be.

Any parent who takes a definitive stance on sleep training needs to understand a few things.

Welcoming a new baby to the world is a wonderful but daunting experience, and no matter how much you try to prepare, there will always be something you aren't fully prepared for.

For many parents, that thing is lack of sleep.

You can hear parents talk about exhaustion and sleep deprivation and still be wholly unprepared for what a baby who isn't a great sleeper does to to your psyche. It's no surprise that many parents turn to parenting books and "experts" to try to figure out how to get their babies to sleep, which is where the idea of "sleep training" comes in.