Phone development/history - technology moving at the speed of light.
A few years ago: That's right dear, our ancestors had tails. Present: That's right dear, our ancestors had buttons.
The only Undisputed evolution is the proven evolution of Technology spearheaded by human which created technology.
For me this picture defines technology because it has advanced for over the years and one of the best examples are mobile phones because now we have the latest generation of mobile phones and they are better than 20 years ago mobiles.