"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."

"He spoke to the Weekend Edition Sunday host Rachel Martin about his new book, a collection of essays called, Thinking in Numbers."