Cambridge Coincidences Collection

As of the 23rd May 2022 this website is archived and will receive no further updates.

understandinguncertainty.org was produced by the Winton programme for the public understanding of risk based in the Statistical Laboratory in the University of Cambridge. The aim was to help improve the way that uncertainty and risk are discussed in society, and show how probability and statistics can be both useful and entertaining.

Many of the animations were produced using Flash and will no longer work.

Well I Never!

Professor David Spiegelhalter of Cambridge University wants to know about your coincidences!

Sun-Earth-Moon

Human life came to exist on (probably?) the ONLY planet in the universe that happens to have 2 neighbors, which coincidentally have distance and size so perfectly offsetting, that we have these events where one fits perfectly inside the other, from our vantage point! Incredibly, the cultures that came before us thought of this as profound and formed their entire cosmology around this fact, yet if you ask an average person the trick question, which one is bigger on the retina, the sun or the moon, they will think about it and then make a guess. No one I have tried that trick on, has said "equal!"

Foreign Exchange Student

In 1989 I was teaching English at a high school in Istanbul, Turkey. In one of my classes there was an American foreign exchange student. When she introduced herself she told me she was from California, where I am also from! I asked if she was from northern or Southern California...she was from Los Angeles, just like me. I asked her what part of Los Angeles, and she said the Pasadena area, which is where I was from. Then I asked her what high school she attended, and she said she went to a small, girls' Catholic school. In those days there were a few catholic high schools, so I asked her which one. She attended the same one I had attended in the 1970s, Alverno High School, with an enrollment of about 600 students, in tiny Sierra Madre, California.

An unknown cousin

As a prologue, I have explain that I inherited rather distinctive last name. Chances are, that if we share my last name, we're related. In the 90s, I worked my way through college working in a gas station. Routinely, people would pas for gasoline with a credit card, so I would learn the names of random people. One day, a gentleman handed me his credit card. In processing his purchase, I noted we shared a last name. When I told him this, he didn't believe me. I had to show him my driver's license to prove it. A bit of genealogical research (done by my father) proved that he was a previously unknown cousin. His family descended from a brother of my great-great grandfather that left Poland at the end of the 19th century. He was a recent immigrant to America and stumbled across me in Michigan.

Of Number 3

Number 3 has been following me most of my life. To start with I was born on the 30th and my numerology number is 9 (3x3). Since then most of my addresses had a house or flat number 3. My marriage lasted 3 years. After the failed marriage I found my beloved partner who happened to be my 3rd serious relationship and we only got together for the third time (after the first 2 times we broke up) . That's when I've noticed that his car plate number was in fact 333.

Twice Chance Encounters

I grew up in Virginia and when I was in high school, I had a massive crush on a guy who was a senior when I was a freshman (2003). In August of 2006, I traveled to the south of Italy and we ran into each other on the top of Pompeii. Later, in June of 2008, I traveled to Barcelona and we ran into each other crossing a street near Las Ramblas.

Backstreet Boy Love

I grew up in Saudi Arabia in the 1990s with a group of girls who all love (LOVED) the Backstreet Boys. Of course, the Backstreet Boys never toured the Middle East and it wasn't until our first year of college that we got to see them live in Canada. At that time, I was studying in Lebanon and my friends were studying in Montreal. They implored that my friend and I fly to Montreal to visit them and attend the concert as a reunion and nostalgia fest. My friends in Montreal purchased their tickets months before we did, so we were absolutely stunned when we arrived at the concert venue and realized that out of the 15,000 seats available, somehow the six of us had seats together! 4 in one row, 2 directly in front of those 4 with a direct view of the stage. It was hard not to feel like the gods had smiled on us, our 20+ year friendship, and our love for the Backstreet Boys and brought us full circle together!

Wait...I know this dog?

I was driving home. As I pulled onto the street toward my house, I noticed in my rearview mirror, something big and black in the road. It occurred to me that it was a dog, laying in the shade of a tree in the middle of the street. I drove over, got out of my car, and walked up to the dog (a lovable black lab) who was all too happy to continue laying in the street wagging his tail. I walked him to the sidewalk, looked at his collar, and called the number. The woman who answered became very concerned, primarily because she lived in Florida, 1700 miles away. She began having a conversation with another person, and I overheard the name of the dog, "Tracer." </p> <p>It then occurred to me. A year before, I had spent the summer working in Alabama with my sister's father-in-law. He and his wife had a dog named "Tracer," a black lab, and they had since moved from Alabama to Florida. Could this be their dog? I live in the southwest, how did he get 1700 miles from home? I looked closer, and sure enough I knew this dog. Moreover, I knew the owner. I had known them since before they moved to Alabama, when they lived in my home city.

Happy Birthday Randy

My name is Randy. I went to New York for the first time on my 29th birthday. As I was walking down 8th avenue for the first time, I happened to glance down at the sidewalk and saw where someone had scratched in the cement when it was first poured. It said "Happy Birthday Randy."

Chance Encounter

I went to film school with a guy named Zack. We weren't super close, but we worked on some films together and were friendly. </p> <p>I graduated August 2005. I moved to Los Angeles for an internship at a small film production company in Beverly Hills. I lived in a house in Hollywood. I did little else at this time besides go to work and go home and do more work. So most of my routine kept me in that small area. The exception was church. I found a great church in Burbank and I started going to Sunday services and Bible study on Wednesday nights. </p> <p>About two months in I was up in Burbank on a Wednesday night. I needed gas, so I pulled over at a random gas station I had never been to before. I filled up and got back in my truck. I just happened to look up into my rear view mirror and BAM, there's Zack. </p> <p>We're in a metropolitan area of like 8 million people and just happened to go to the same gas station on the same night at the same time AND I just happened to look in my rear view mirror at the right time.

A Meet Up Down Under

I live in the States and went to Australia on a business/holiday trip. On the last day of the trip I needed to exchange my Australian currency back to US dollars. Instead of paying the expensive exchange fee, I decided to just spend the money on souvenirs. As my favorite type of shopping is in thrift stores, I headed to one. While I picked out t-shirts, I noticed a lady chatting at length with the cashier. When I went to pay for my finds, she stepped aside, but continued her conversation. As soon as I spoke she broke in and asked "Are you an American?" I replied I was and she asked where I was from. Because the town I grew up in was very small, I instead mentioned the state and said I was from a small town there. She asked "Do you know Small City?" I was surprised and said "Yes, Small City is the biggest city near my small hometown, Small Town." She then said "Do you know Lake Shore Boat Dock?" surprising me again. I said "Yes! Lake Shore Boat Dock is 6 miles from the house where I grew up. Both of my brothers worked there as teens and my older sister dated one of the workers.

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