2.

Money is a universal means of exchange. A technology that is enabled by something that has the highest proportion of trading ability to its utility (gold can be used for trade but also for jewelry & chips).

Money needs 5 characteristics. It needs to be:

1. ...

Incandescent light bulbs existed before Thomas Edison, and when other inventors got wind of Edison's tinkerings, they roundly sued him for patent infringement. 

So what did Edison actually do?

He discovered that a special species of bamboo had a higher resis...

Albert Einstein held that space and time together made up the universe's fabric that could stretch and compress. Einstein suggested that the shape of spacetime is what gives rise to the force of gravity. A concentration of mass, like the earth or sun, ben...