Falling is a leading cause of injury death. Only car accidents kill more people. But is it possible to survive a fall from an airplane?  It's happened a few times. Popular Mechanics did a bunch of research on this, and they found some surprising things. There are a few things you can do if you fall out of the plane. First, choose a target. You have some ability to steer yourself in the air. Look for something that may help your landing. Snow, mud, swamp, etc.  Avoid concrete and avoid water. Water doesn't compress. It's very dangerous. Assume a free fall position the way you see skydivers do it. Keeping your arms and legs out will help slow you down and steer a bit. Just before impact go feet first. Your legs essentially become a crumple zone. There are actually verified stories of people who survived falls from airplane height. Vesna Vulovic was traveling over Czecholslovakia in 1972 when the DC-9 in which she was a passenger blew up. She fell 33,000 feet. She survived by landing on a snowy incline. Alan McGee was a turret gunner on a B-17 Flying Fortress. He jumped out of the damaged plane over Saint Nazaire, France on Jan 3 1943. He fell through the roof of the St. Nazaire railroad station. Nicholas Alkemade jumped from a burning Lancaster bomber over Germany. His fall was broken by pine trees and snow. He suffered only a sprained leg. Historian Jim Hamilton has studies these stories extensively and believes there have been 42 survivors of falls greater than 10,000 feet. Stuff Your Dad Knows is hosted by Ethan Millard. What do you do when your children hit you up with crazy questions? Do you know the answer? Do you just pretend? Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain. If you want to be more efficient, just listen to the podcast with your children present. Then you don't have to be the information middle man. Family harmony is our goal! If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you! Follow him @EthanMillardKSL on Twitter.

Ethan Millard is joined this episode by Rebecca Cressman of FM100 KSFI in Salt Lake City. Have you ever poked your finger in there?  Really crammed it down? Feels weird, right? There's a reason for that. All placental mammals have navels. It's the point of contact for the umbilical cord which handles all nutrient and waste issues for a developing fetus. The navel is essentially a scar. When you poke your finger in there really deep, you stimulate some nerves that your brain interprets as being somewhere around your bladder. Do you have an innie or an outie? Most people have innies.  That's also what people prefer aesthetically. Whether you get one or the other has to do with the way the scar tissue forms. It's not determined by the way doctors cut or clamp the umbilical cord. Graham Barker has been collecting his navel lint (also called navel fluff) since 1984. He stores it in little jars and in 2000 the Guinness Book of World Records declared his collection to be the largest of all the navel fluff collection. If you have hair on your abdomen you will collect much more navel lint than others. The hair helps guide the lint to the navel. The lint itself is made of clothing fiber, skin, and hair. Neat! Stuff Your Dad Knows is hosted by Ethan Millard. What do you do when your children hit you up with crazy questions? Do you know the answer? Do you just pretend? Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain. If you want to be more efficient, just listen to the podcast with your children present. Then you don't have to be the information middle man. Family harmony is our goal! If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you! Follow him @EthanMillardKSL on Twitter.

Stuff Your Dad Knows host Ethan Millard welcomes a new guest co host, Emily. They're... close. The two talk about whether or not cracking your knuckles is really a problem or if it's just something you can totally do with no regrets. Stuff Your Dad Knows is hosted by Ethan Millard. What do you do when your children hit you up with crazy questions? Do you know the answer? Do you just pretend? Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain. If you want to be more efficient, just listen to the podcast with your children present. Then you don't have to be the information middle man. Family harmony is our goal! If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you! Follow him @EthanMillardKSL on Twitter.

Stuff Your Dad Knows host Ethan Millard is joined by KSL News Radio's Joe Davis to talk about the history and use of swear words. They also talk about how much emotion they convey, which is probably why they're so prevalent. Stuff Your Dad Knows is hosted by Ethan Millard. What do you do when your children hit you up with crazy questions? Do you know the answer? Do you just pretend? Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain. If you want to be more efficient, just listen to the podcast with your children present. Then you don't have to be the information middle man. Family harmony is our goal! If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you! Follow him @EthanMillardKSL on Twitter.

Stuff Your Dad Knows host Ethan Millard interviews Mike Peters of The Alarm. Afflicted with cancer, Mike has established the Love Hope Strength Foundation to promote blood transfusions and bone marrow transplant. Ethan and Mike talk about cancer, and how to take the symptoms seriously and get early treatment. They also talk about Mike's music past. He was inspired by the Sex Pistols and even asked Johnny Rotten himself what anarchy meant. Mike has toured with some major acts including U2 and Bob Dylan. Stuff Your Dad Knows is hosted by Ethan Millard. What do you do when your children hit you up with crazy questions? Do you know the answer? Do you just pretend? Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain. If you want to be more efficient, just listen to the podcast with your children present. Then you don't have to be the information middle man  Family harmony is our goal! If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you! Follow him @EthanMillardKSL on Twitter.

Hiccups are a spasm of the diaphragm muscles coupled with a closing of the vocal chords. There are a few theories as to why they happen, but mostly people want to know how to make them stop. Unfortunately, there is no guaranteed way to get them to stop. You can try holding your breath, sucking a lemon. Almost anything that interrupts the spasms may work. If they persist, you may have a medical problem. Neurological damage can cause hiccups.  Christopher Sands from UK had hiccups for more than two years.  Turns out a brain tumor was the cause. A doctor successfully treated the tumor and the hiccups went away. The Guinness Book of World Records records that Charles Osborne of Ohio holds the record for longest bout of hiccups. It lasted from 1922 to 1990. Rough life. Stuff Your Dad Knows is hosted by Ethan Millard. What do you do when your children hit you up with crazy questions? Do you know the answer? Do you just pretend? Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain. If you want to be more efficient, just listen to the podcast with your children present. Then you don't have to be the information middle man. Family harmony is our goal! If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you! Follow him @EthanMillardKSL on Twitter.

Your child may complain about sleeping, but this episode of Stuff Your Dad Knows will give you some ammunition.

Sleep is important for cataloguing memories. It's when your brain does its filing and storage.

Brian Foxx of FM100.3 joined Ethan Millard for this episode and they also discussed how people in the past slept.

A few generations ago, it was much more common for people to sleep in two large blocks of about four hours separated by a waking break of a few hours.

The use of street and indoor lighting prompted people to stay up later, squeezing the two blocks into one.

Stuff Your Dad Knows is hosted by Ethan Millard.  What do you do when your children hit you up with crazy questions?  Do you know the answer?  Do you just pretend?  Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain.  If you want to be more efficient, just listen to the podcast with your children present.  Then you don't have to be the information middle man.  Family harmony is our goal!

If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you!  Follow him @EthanMillardKSL on Twitter. 

Your kid asked for a drink of your caffeinated soda. This happens to every parent.

Reflexively you say no, mumbling something about caffeine. But what if your child has a follow up question? What do you say? Can you really say that caffeine is dangerous for kids?

This episode, Ethan Millard is joined by Blair Carter of FM100.3 & The Arrow 103.5FM

They discuss the effect caffeine can have on your body. Caffeine does affect children's bodies, increasing their blood pressure and at higher doses, increasing their heart rate.

But it's not clear what long term damage there is, if any, to children consuming caffeine.

Most parents will be naturally cautious enough to object to their children ingesting high amounts of caffeine, but lots of kids will use it in small amounts.

Caffeine is generally regarded as safe to use, but it is possible to fatally overdose.  Online you can buy pure caffeine powder. Some buy this as a supplement, and put it in shakes and other things.

One tablespoon of pure caffeine powder will kill an adult. It's sad, but people do get the dosage wrong and accidentally kill themselves with caffeine.

Death is not a risk for coffee and soda drinkers. As and adult, you would have to drink around 100 cups of coffee to put your life at risk. A prohibitive amount.

Stuff Your Dad Knows is hosted by Ethan Millard.  What do you do when your children hit you up with crazy questions?  Do you know the answer?  Do you just pretend?  Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain.  If you want to be more efficient, just listen to the podcast with your children present.  Then you don't have to be the information middle man.  Family harmony is our goal!

If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you!  Follow him @EthanMillardKSL on Twitter. 

Ethan Millard is joined by Rebecca Cressman, midday host at FM100.3.

Ethan comes from a family of big heads. They have big heads. A few of them have ridiculously big heads. It's a family trait. His parents always said "big head, big brains".

Is that true? Is your brain big because your head is big? And does that make you smarter?

Of course a larger brain would require more space in a larger skull, but a large head could also be caused by thicker bone or a lot of musculature. Our heads are full of muscles. That can make your head look bigger.

Researchers at the University of Tennessee did a study and found that human skulls are larger than they were in 1825. Our heads have grown 1/3 inch taller and have about a tennis ball worth of extra brain space.

Some scientists believe that our modern lifestyle has done this. Humans enjoy more calories and less strenuous work today than in 1825.

Another theory is that because of modern medicine, more large headed babies are born. In 1825, a lot of large heads would have failed to birth.

But what about the question of whether or not a bigger brain means your smarter?

The Stanford Neurosciences Institute says the science linking brain size and intelligence is weak. There are animals with bigger brains than humans. The average human brain is 3lbs, give or take. An elephant brain is 11lbs and a sperm whale brain is a whopping 18lbs.

Humans do have abnormally large brains compared to their actual body size, but intelligence is based on a lot of factors. Nutrition and stimulation during development is a well known factor of intelligence.

Different parts of the brain can vary in size from person to person and scientists believe that can also play a role in how a person thinks.

One problem with researching brain size and intelligence is that the research tends to use IQ tests.  These don't measure important human elements such as creativity and social intelligence.  IQ tests also can't predict how successful a person will be in their life. 

Stuff Your Dad Knows is hosted by Ethan Millard.  What do you do when your children hit you up with crazy questions?  Do you know the answer?  Do you just pretend?  Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain.  If you want to be more efficient, just listen to the podcast with your children present.  Then you don't have to be the information middle man.  Family harmony is our goal!

If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you!  Follow him @EthanMillardKSL on Twitter. 

The type of earwax you have indicates whether or not you have smelly armpits!  It's true! The gene that brings you wet, sticky earwax is also responsible for the excretion of a protein with your sweat under your arms. It's that protein that attracts bacteria and STINKS!

Lots of people around the world actually have dry, flaky earwax. They don't have that same protein secreted under their arms and so they don't stink so much.

That's just one of the interesting things covered in this episode by Ethan Millard and his guest co- host Sue Kelley of 103.5 The Arrow, Utah's Classic Rock.

Believe it or not there are also a few household uses for earwax.  In the past, it's been used in sewing to keep cut thread from fraying. It was also an early ointment for small cuts.  It's even been reported to have been used as a lip balm.  Do we need to mention that none of these statements have been evaluated by the FDA etc etc...?

As you could probably guess, your earwax protects your ears. It originates well inside your ear canal then flows outward, carrying with it dead cells, hairs, and any contamination it can trap. The earwax carries it all right out of your body.  Pretty cool system, even if it is a little gross.

If you catch your kids tasting their earwax, don't worry, it's just a mass of long chain fatty acids and a few other substances naturally produced by your body.

Some research has also indicated that earwax has an anti microbial effect. This would explain its early use as a salve (gross).

Doctors say to be careful in cleaning earwax from your ear. For the most part, your ear canal never needs to be cleaned out and you should definitely never stick anything down there. If you push a q-tip into your ear canal you could damage your eardrum, introduce infection, or cause the ear wax to mash down further and become impacted.

Impacted earwax can lead to hearing loss and that's when you should visit a doctor. Don't try to clean your child's impacted ear wax yourself. A doctor can use special tools to scrape away the wax or to flush it out using an irrigation system.

Stuff Your Dad Knows is hosted by Ethan Millard.  What do you do when your children hit you up with crazy questions?  Do you know the answer?  Do you just pretend?  Kids are smart, so this podcast empowers parents to answer those tough questions and stay at the top of the family food chain.  If you want to be more efficient, just listen to the podcast with your children present.  Then you don't have to be the information middle man.  Family harmony is our goal!

If you want to ask a question, use #stuffyourdadknows and Ethan will answer it for you!  Follow him @EthanMillardKSL on Twitter.