Using film industry statistics, digital photography estimates and numbers kept by producers of silver halide, an important chemical for analog film, researchers calculated the number of photographs ever taken.
The first photo ever was called "View from the Window at Le Gras" by French inventor Joseph Nicéphore Niépce.
The oldest known photo with a person in the shot shows a man in Paris getting his shoes shined.
It's estimated only a few million pictures were taken in the 80 years before the first commercial camera was introduced.
Photography became more widespread when the Kodak Brownie was released in 1900. It cost $1.
By 1930, about a billion photos were taken a year.
By 1960, about 3 billion photos were taken a year.
It's estimated that by 1960, 55 percent of photos were of babies.
By 1970, about 10 billion photos were taken a year.
By 1980, about 25 billion photos were taken a year.
By 1990, about 57 billion photos were taken a year.
By 2000, about 86 billion photos were taken a year.
Today, we take more than 380 billion photos a year.
It's the largest ten-year increase ever.
And it's not slowing down.
Every two minutes, we take more pictures than the whole of humanity in the 1800s.
There are a billion photos on Instagram.
300 million photos are uploaded to Facebook every day.
And only 20 percent of the photos taken today end up on Facebook.
There are 10,000 more photos on Facebook than there are in the Library of Congress.
Humans really like taking pictures.
We've taken a lot.
And it's estimated that makind has taken...
3.8 trillion photos. Ever.
Three point eight trillion!
3.8 trillion memories.
3.8 trillion moments.
And if a picture is worth a thousand words...
That's 3,800,000,000,000,000 words.
It would take nearly 145 billion iPhones to store 3.8 trillion photos.
We couldn't have done it without you!
About ten percent of the photos ever taken have been taken in the past 12 months!
You've probably deleted more pictures where you were in the middle of blinking than some people took in their entire life.
So keep taking pics!
And may our next 3.8 trillion be as memorable as the first.