"mm" wrote in message
...
In high school physics, the three methods of heat dispersal were
presented as conduction, radiation, and convection?

Is that all there is? Is diffusion a fourth or is it subsumed by
convection?

How about some of the tricks used to achieve near absolute zero
temperatures. I recall they are quite exotic and involve lasers and optical
cavities and the like - but perhaps they all amount to conduction or
radaition?