00:00Let's see how many rare body features you or your friends have.
00:05Elf-like ears are pretty rare.
00:08They are different because of the pointy part on the outside.
00:11There's an additional cartilage fold in the middle area around the part we know as the scapha.
00:17Most people are right-handed, while about 10% of them are left-handed.
00:22But there are those with no preference for using a left or right hand.
00:26They can play guitar, use scissors, write, and perform all other activities with any hand they want.
00:33Only 1% of those can do it, and we know them as ambidextrous.
00:38And if you can talk out of both sides of your mouth, you may have a future in politics.
00:43Less than one-third of the population can flare the nostrils on command.
00:47The muscle in charge of this is weak because we have nothing to use it for.
00:52That's why most people can't do such things with their nostrils on command.
00:57People that live in Nepal and Tibet have a specific gene that allows them to breathe at such high altitudes.
01:04Most people feel sick in such conditions, but they are unique because they can breathe normally.
01:10It's a super-athlete gene they have there.
01:13You can trace it back to denosovans, a group that lived in the mountainous areas around Asia around 40,000 years ago.
01:20This gene brings them a higher level of oxygen-carrying hemoglobin.
01:24That's why the body can distribute oxygen more efficiently, so, unlike us, they won't feel oxygen-deprived when performing certain tasks at such altitudes.
01:34Arcus salinus is also pretty rare.
01:38It's a white or gray arc you can see above and below the outer region of the cornea.
01:43In other words, the clear dome-like thing that covers the front part of your eye.
01:48It's something common in older people.
01:50This arc may become a complete ring around the iris, the colored portion of the eye.
01:55Some people naturally don't need to sleep too much.
02:00The majority of us cannot take a couple of nights of lost sleep without consequences.
02:05But a small percentage out there has this special gene that allows them to get away with sleeping 6 or even fewer hours, which is about 2 hours less than average.
02:15From 1 to 3% of the population has this so-called clock gene.
02:20They can be more productive, because they don't feel tired as we do when we sleep less.
02:26Leonardo da Vinci, Thomas Jefferson, and some other famous historical figures were some of them.
02:33Now, most people have three cones in their eyes, so we can see a broad color spectrum.
02:38But some have a rare fourth cone.
02:41We call them tectrichromates.
02:43And because of this feature, they can see up to 100 million colors.
02:47The rest of us average folks see about 1 million colors.
02:52It's a rare body feature you can mostly find in women.
02:56Have you heard of heterochromia?
02:58It's a rare condition where people have eyes of different colors or different colored sections in each eye.
03:05Sometimes this condition can lead to differences in color in some other parts of the body, like hair or skin.
03:11Or it can result in irises with two different hues.
03:14Heterochromia is a condition that happens because, due to genetics, some people have unevenly distributed melanin in their bodies.
03:23And only 1% of the population has it.
03:28Chimerism is a rare genetic condition where a person has two completely different sets of DNA, which we call genomes, in their body.
03:35One genome is predominant in one organ or generally one area of the person's body, whereas the other is in other tissues or organs.
03:45Even animals can have this condition.
03:48Both animals and humans with chimerism can even have two different blood types in their body simultaneously.
03:55And we may be talking about different amounts of each of those types.
03:59It would be cool to have bones so dense, almost nothing could break them.
04:04Some people have them, thanks to an LRP5 gene mutation.
04:09People with these rock bones have 8 times denser bones than most.
04:13When someone says there's a thing called golden blood, it's easy to imagine small particles of blood running through some people's veins.
04:21But it's not quite like that, nor does it have a golden color.
04:25It's called this way because we're talking about a pretty rare blood group only about 40 people in the world have.
04:33These people don't have all RH blood cell antigens, which, in simple terms, means anyone who has another rare RH group can have this type as donor blood, which is pretty helpful.
04:44Hey, check this out.
04:47It's something called a long palmar muscle, and it was way more important to our ancestors than to us.
04:54Some of them were pretty big fans of climbing trees, so they developed a specific muscle and ligament to perform that through time.
05:01And some people still have it even today.
05:04To check if you have it, just put the back of the palm on a flat surface.
05:08Now touch your thumb and pinky together and lift them slightly.
05:12If you see your ligament popping out, yep, you have a long palmar muscle.
05:19Some have photosneeze reflex, which is a special condition where people uncontrollably sneeze in response to bright light.
05:27So the sun makes 10-35% of people sneeze.
05:31If you have a perfect pitch, you should know it's really not that common.
05:36It's when someone is able to identify and tell different musical notes based on their frequencies.
05:42So if you hear a D sharp, you can tell it's a D sharp without too much guessing.
05:47Fewer than 1 in 10,000 people say they can have a perfect pitch, and is still not sure if you get it naturally or if it's necessary to develop it at a very early age.
05:58Because research showed you can develop a perfect pitch, it takes a lot of training and consistency to immediately tell the key and notes of your favorite song.
06:10Not many people have naturally blonde hair, and red hair is even rarer.
06:15Less than 2% of the population has it, and 11% of the human race have naturally curly hair.
06:21We all learned in school that the heart is leaned toward the left side of the chest, but certain people have it on the right side.
06:31It doesn't necessarily mean this condition would have some negative consequences, but it can affect the rest of the organs.
06:38Around 22% of the human race has Morton's toe.
06:43And Morton wants it back.
06:44Just kidding.
06:46Morton's toe is when your second toe is longer than the big one.
06:49If you look carefully, you'll see the Statue of Liberty has Morton's toe.
06:53Some have this tiny bump on the inside of the upper part of their ear.
07:00It's known as Darwin's bump, or Darwin's tubercle.
07:03Some even believe people who have this little bump potentially sense voice tonality better.
07:10Only 60% of people across the globe can produce a roaring noise in their heads.
07:16They do it by using their jaw.
07:17They control a tiny muscle in the jaw that prevents it from hearing certain noises like chewing.
07:24But when these people flex it, they can hear a roaring noise from inside.
07:30About one-third of the population can gleek.
07:33And just 1% can do it on command.
07:36Not that useful, but still rare.
07:404% of people have Raynaud's syndrome.
07:42This is when a part of your body, usually your fingers or toes, start to turn white when exposed to low temperatures.
07:50It's your body's overreaction to cold or distress.
07:54Now, check your fingerprints.
07:56Are they looped, whirled, or arched?
07:59The first two types are more common, while just 5% of people have arched fingerprints.
08:05Not many people have birthmarks, only 10% of them.
08:08In most cases, birthmarks are oval and have a coffee-type color.
08:14Dimples may seem like something common, but only a quarter of the world's population have them.
08:20You can have one or two dimples.
08:22And they're something we inherit, so if your parents have it, mm-hmm.
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