The message
from Peter Parry contains these words:

And while you're at it, explain how a 600lb ruminant is capable of
wingless
flight

Once again - no one is reading NewScientist - where a report has suggested
that super conductors and rapidly rotating things can change the mass of
gravitons, implying that anti-gravity, tractor beams and repulsors etc might
be possible (in the same sense that travel through worm holes might be
possible if one just had a convenient black hole).

It is well known that Santa Claus lives at the North Pole, and the North
Pole is very, very cold, probably cold enough to render the reindeer's shoes
superconducting. The rotation is supplied by small silver balls that are
spun at very high rates (the reason why baubles are put on Xmas trees). This
also explains why Santa Claus comes around in the eraly hours of a mid
winter morning - this is to keep the sleigh cool and keep the
superconductors superconducting.

Of course it's just possible that I have got the science slightly
confused....

Andy