# Photo-Fest

October 22, 2020

It’s easy to snap pictures of anything these days, because so many phones can work like cameras. In the old days, taking a picture was so hard! The light bounced into a black box, where it hit a clear plastic film covered in chemicals. It took time for the chemicals to change color, so the person in the photo had to stand still for whole minutes without moving at all. Now it all happens in a split second with electronics. So our fan Yuri R. S. asked, how many pictures are taken every year around the world? Unbelievably, it’s 1 trillion or more (1,000,000,000,000). But with almost 7 billion cell phones out there, that comes to only about 140 photos per person per year. When that many people are snapping selfies, the photos stack up fast!

Wee ones: The lens of a camera (where the light goes in) is usually a circle. See if you can spot 3 circle shapes in your room.

Little kids: If you take 1 picture each day this week, how many do you take?  Bonus: If you take pictures of 2 people, and each of them takes pictures of 2 people, how many people got to pose for a picture?

Big kids: There are 8 billion people in the world, and 7 billion cell phones. If 2 billion people each had 2 of those phones, how many people would have no phone at all?  Bonus: If 300 million Americans each took 10 pictures this week, how many pictures would that come to?