Strange but interesting stuff

At 12:20, the video gets into modern parallel theories, and why the quantum world calls for parallel universes.

A lot of the discussion is based on the ideas of infinity, leading to :

From Reddit:

"Some infinite sets are larger than others. It's weird, but true. Think about this: There is an infinite amount of integers, right? I can count forever and never stop. By that logic, there is an infinite amount of odd integers. Even if I skip every even integer, I can still count forever. However, I'm only using half of them. Therefore, one infinite set is larger than the other.

Another example: There is an infinite amount of numbers between 0 and 1. Every fraction less than one is in there, from 1/2 to 3/8 to 13475/23498745. However, it pales in comparison to the set of every number, positive or negative, fraction or not. No competition. This set of all real numbers is inconceivably larger than the previous infinity.

There are an infinite amount of elephants in a room. Not one of them, therefore, is a tiger.

There is an infinite amount of animals in a room. There is an infinite number of tigers, and also an infinite number of elephants.

There's more animals than just elephants, therefore the total amount of animals is larger than these infinite elephants. Some infinities are larger than others, and can contain other, smaller infinities.