"I read a study
that measured the efficiency
for various species
on the planet.
The condor used the least energy to move a kilometer.
Humans came in with a rather unimpressive showing
about a third of the way down the list.
... then someone at Scientific American had the insight
to test the efficiency of locomotion
for a man on a bicycle,
[who] blew the condor away.
That's what a computer is to me
... the most remarkable tool that we've ever come up with.
It's the equivalent of a bicycle for our minds."
--Steve Jobs, in a 1990 interview