energy (5)

Computing, along with all other aspects of Information Technology, is frequently considered to be one of the major challenges we face - but the power it gives to people means that it must also be one of the answers.
The flywheel is a piece of old technology, used to store and move energy, which appears in a surprising number of places.
This is the fundamental practical challenge facing the human race: our civilization depends upon using vast amounts of energy; the way we use energy is changing the climate and destroying the ecosystem which our survival depends upon; and we would ha