June 11, 2005 — Daniel Tammet of England can verbally reel off the number pi to 22,500 decimal places in just over five hours — though he admitted after a recent demostration that it made him "very tired."
Tammet, 26, is a phenomenon. He has done lots of amazing things — like learning Icelandic, one of the world's most difficult languages, in just seven days.
That's because Tammet is an autistic savant. His extraordinary abilities stem from a combination of autism and a condition known as synesthesia. His form of autism, however, leaves him with less limited verbal skills than many other autistics.
Source: ABC News/ ABC video