Money, dark matter, life, the moon, concepts/theories, wisdom, knowledge, the earth, the Internet, etc.

You can actual buy an acre of the moon on the internet and you can buy land/houses on the internet.

1. The internet - It was invented decades ago specifically for scientists worldwide to communicate theories and discoveries to one another.
2. Publications.
3. Public and private presentations.

I do not believe there is an exact answer to this question. Apparently there are lots of different theories on who and when the internet was invented.

There are four main types of personality theory. Begin with biological theories, behavioral theories, psychodynamic theories, humanist theories and trait theories.

theories 1. climate change

theories 2. ecological theories