"To infinity and beyond!" — Buzz Lightyear

I was reading this article yesterday I really loved Cantor's diagonal argument.
Cantor shattered the illusion that all infinities are equal by introducing uncountable infinity

Suppose you try to list all real numbers between 0 and 1.

Modify each decimal in the nth number's nth place (the diagonal).

This process gives you a new number not in your list, no matter how complete you think it is.
Even if you had eternity, you'd miss some.

ℵ₀ (aleph-null) — countable infinity (e.g. natural numbers).
𝑐 (the cardinality of the continuum) — uncountable infinity (real numbers).
And beyond: Cantor's theorem shows there's always a bigger infinity, by taking the power set.

Pretty simple yet mind bending lmfao