According to my theories time is nothing but change so in fact it is
relatinship with two changes.In physics change is very essential concept.
If there is no change there is no time. Normally we measure time com-
pearing the changes of the physical variables withw the changes of the
clocks minute hand. I thing we make a mistake if we think that time is
similar to the space cooerdinates. So change flows only to the one
direction. So time travel is impossible.
Pertti Koivisto
 Room temperature superconductors
Superconductors conduct electricity nearly or totally without resistance.
Most often they have this property only in very low temperatures.
However there are found higher temperature superconductors which most
often are rare metal oxides.
It is interesting to note that many metallic oxides
especially iron oxide are magnets. From that we can determine that we have
room temperature superconductors-magnets.However in these materials elec-tri
city flows in loops. That is because there are impurities in these materi
als. IF we should form very pure and regular iron oxide crystal we shall
very high temperature superconductor.THis theory is made by myself.
Pertti Koivisto