It depends on what we mean by forever. In the end, there can be only one.
"Channel 4 Documentary
following the revolutionary life-extension and immortality ideas of
this somewhat eccentric scientist, Dr. Aubrey de Grey.
This show is all about the radical ideas of a Cambridge biomedical
gerontologist called Aubrey de Grey who believes that, within the next
20-30 years, we could extend life indefinitely by addressing seven
major factors in the aging process." [watch it]