Another application is mood rings and they use reversible thermochromic chemicals. Try checking out http://en.wikipedia.org/wiki/Thermochromism
Responce
Sexy
Besides an explorer, he was a sailor, soilder and navigator.
EmuKiwiKakapoRheaCassowary
no
Harp
uhmm, explain?
cvbnm,.
no
no
no
Lemuria.