[00:01.80]4 Immortality has been a constant theme

[00:04.43]in futurology.

[00:05.34]Actually, we do now know how to extend life-

[00:08.55]by eating less and exercising more.

[00:10.99]Even so, Californian cryogenics super-

[00:13.97]salesmen have persuaded some people

[00:16.53]to part with vast sums of money on a promise

[00:19.60]that will defrost them when "the time is right"

[00:22.59]But since we haven't yet even perfected

[00:24.57]freezing strawberries,

[00:26.20]these poor deluded souls may be nothing

[00:28.66]more than mucky puddles by 2052.

[00:31.98]As for transport, the reason we aren't

[00:34.47]all buzzing around in our own mini-

[00:36.42]planes has quite a lot to do with the fact

[00:39.01]that nobody thought about what would happen

[00:41.09]when everyone wanted one.

[00:42.88]Were they going to be stacked high

[00:44.35]above our streets,

[00:45.79]stuck in an endless holding pattern

[00:47.92]while we desperately tried to do our shopping?

[00:49.53]