We're used to thinking of "Infinity" as meaning
"As big as you can get". In this talk we find
that when we think carefully about "going on forever"
we discover that there are different types of infinity,
and, even more puzzling, and defying all expectation,
different sizes of infinity.
Prepare to have your mind blown.
There were no headings
in the main text so there
is no table of contents.