Are We All 50th Cousins? The Surprising Truth About Human Kinship
The short answer is yes, we probably are all 50th cousins or closer. This seemingly outrageous claim actually stems from basic mathematics and population genetics.
How the 50th Cousin Theory Works
The math behind this idea is surprisingly straightforward. If you go back just 40 generations (roughly 1,000 years), you have over one trillion ancestors. Yet the total number of people who lived on Earth at that time was only about 300 million. This mathematical impossibility is called "pedigree collapse" - the same ancestors appear multiple times in your family tree.
Let's break this down. You have two parents, four grandparents, eight great-grandparents, and so on. Each generation back doubles your ancestors. By the time you reach your 40th generation, you theoretically have 2^40 ancestors - that's over one trillion people. But here's the problem: Earth's population was nowhere near that number. So those trillion "slots" in your family tree must be filled by far fewer unique individuals.
Geneticist Graham Coop calculated that any two people living in the same country today share a common ancestor who lived about 1,000 to 2,000 years ago. That makes us all roughly 50th cousins. And if we expand to all humanity? We're probably all 55th cousins or closer.
The Mathematics of Shared Ancestry
Consider this: if you trace your ancestry back 600 years (about 20 generations), you have over one million ancestors. But in 1400, the global population was only around 350 million. The numbers simply don't add up unless you're related to virtually everyone who was alive then.
The concept gets even more mind-bending when you consider that migration patterns mean people from different continents share ancestors much more recently than you might expect. European, Asian, and Native American populations share common ancestors who lived just 2,000 to 3,000 years ago.
Why This Isn't as Simple as It Sounds
Before you start calling strangers "cousin," there's an important caveat. Being 50th cousins doesn't mean much in practical terms. The amount of DNA you share with a 50th cousin is so tiny it's virtually undetectable. You'd share about 0.000000000000001% of your DNA
💡 Key Takeaways
Is 6 a good height? - The average height of a human male is 5'10". So 6 foot is only slightly more than average by 2 inches. So 6 foot is above average, not tall.
Is 172 cm good for a man? - Yes it is. Average height of male in India is 166.3 cm (i.e. 5 ft 5.5 inches) while for female it is 152.6 cm (i.e. 5 ft) approximately.
How much height should a boy have to look attractive? - Well, fellas, worry no more, because a new study has revealed 5ft 8in is the ideal height for a man.
Is 165 cm normal for a 15 year old? - The predicted height for a female, based on your parents heights, is 155 to 165cm. Most 15 year old girls are nearly done growing. I was too.
Is 160 cm too tall for a 12 year old? - How Tall Should a 12 Year Old Be? We can only speak to national average heights here in North America, whereby, a 12 year old girl would be between 13
❓ Frequently Asked Questions
1. Is 6 a good height?
The average height of a human male is 5'10". So 6 foot is only slightly more than average by 2 inches. So 6 foot is above average, not tall.
2. Is 172 cm good for a man?
Yes it is. Average height of male in India is 166.3 cm (i.e. 5 ft 5.5 inches) while for female it is 152.6 cm (i.e. 5 ft) approximately. So, as far as your question is concerned, aforesaid height is above average in both cases.
3. How much height should a boy have to look attractive?
Well, fellas, worry no more, because a new study has revealed 5ft 8in is the ideal height for a man. Dating app Badoo has revealed the most right-swiped heights based on their users aged 18 to 30.
4. Is 165 cm normal for a 15 year old?
The predicted height for a female, based on your parents heights, is 155 to 165cm. Most 15 year old girls are nearly done growing. I was too. It's a very normal height for a girl.
5. Is 160 cm too tall for a 12 year old?
How Tall Should a 12 Year Old Be? We can only speak to national average heights here in North America, whereby, a 12 year old girl would be between 137 cm to 162 cm tall (4-1/2 to 5-1/3 feet). A 12 year old boy should be between 137 cm to 160 cm tall (4-1/2 to 5-1/4 feet).
6. How tall is a average 15 year old?
Average Height to Weight for Teenage Boys - 13 to 20 Years
Male Teens: 13 - 20 Years)
14 Years
112.0 lb. (50.8 kg)
64.5" (163.8 cm)
15 Years
123.5 lb. (56.02 kg)
67.0" (170.1 cm)
16 Years
134.0 lb. (60.78 kg)
68.3" (173.4 cm)
17 Years
142.0 lb. (64.41 kg)
69.0" (175.2 cm)
7. How to get taller at 18?
Staying physically active is even more essential from childhood to grow and improve overall health. But taking it up even in adulthood can help you add a few inches to your height. Strength-building exercises, yoga, jumping rope, and biking all can help to increase your flexibility and grow a few inches taller.
8. Is 5.7 a good height for a 15 year old boy?
Generally speaking, the average height for 15 year olds girls is 62.9 inches (or 159.7 cm). On the other hand, teen boys at the age of 15 have a much higher average height, which is 67.0 inches (or 170.1 cm).
9. Can you grow between 16 and 18?
Most girls stop growing taller by age 14 or 15. However, after their early teenage growth spurt, boys continue gaining height at a gradual pace until around 18. Note that some kids will stop growing earlier and others may keep growing a year or two more.
10. Can you grow 1 cm after 17?
Even with a healthy diet, most people's height won't increase after age 18 to 20. The graph below shows the rate of growth from birth to age 20. As you can see, the growth lines fall to zero between ages 18 and 20 ( 7 , 8 ). The reason why your height stops increasing is your bones, specifically your growth plates.