There are numbers all around us. They are in every word we speak or write, and in the passage of time. Everything in our world has a numeric foundation, but most of us don't see those numbers. It's different for Daniel Tammet. He's a savant with synesthesia, a condition that allows him to see beyond simple numerals — he experiences them.
Tammet drew attention around the world about a decade ago when he recited, from memory, the number pi. It took him five hours to call out 22,514 digits with no mistakes.