Greatest Moments

the day ice cream was invented!

For my serious answer, perhaps it was the day the wheel was invented. Of course there was no one day....just speaking figuratively.

Maybe when you say what you think is the greatest moment, also include a time frame.

If you talk about the whole of mankind, perhaps wheel is the most used now, but is it the greatest?

The guy who invented the wheel was just lucky... the guy who invented the other three... He was a genius

Seeing how general the topic is...perhaps you can narrow it down a tad?
How would you narrow down a timeframe? Wheel was invented by pre-historic man..perhaps even cavemen?

up to you to narrow it down how you will.

Easiest way would be to say what you think is the greatest moment in 2011? from 2000 to date? From the start of the age of the electronics (60's?) to date?

and work yourself back if you want... past centenary, millennial, start of mankind.

Doesn't matter what the time frame you choose, as long as you mention it