Questions no one knows the answers to (Full Version) - Chris Anderson

- Question no one knows the answers to. Great list of difficult question.

- No one knows the answer to: How many universe exist?

- Galaxy->grain sand; milky way fill 30 by 30 vy three sands;

- String theory-> countless (?) other universes, build on different properties. 11 dimensions. 10^500 universe

infinite universe.

No agreement on this question 0->infinity


- Why can't we see evidence of aliens life?

- Half of trillion planet in the galaxy

- Other civilization in million of years of advance

- Possible answer:
- A superior species made a radio silence; and ready to eliminate other species.
- Maybe it's fare harder than we think: four billions year

- Just haven't look it up yet ( looking in too short time)
 - Maybe not looking the right way (dark matter?)

- Maybe looking at wrong scale ( smaller scale turn itself microscopic )

- Maybe biological life is just a passing phase. ( interesting)

I like the message. Haven't done fact check yet, but it is a good thing that someone is asking/discussing the difficult question.