Do you guys remember those old popular holographic pictures?

Holographic pictures were very popular decades ago, I can still remember my friends purchased magazines and tried to see something on those pics, where I couldn't see most of the images...

Did you know why and how that thing appear and what this transformed into now?

Here are 2 great and awesome writings just for you, my friends: - history of Holography. - No more science fiction: 3D holographic images.