On 7/7/2010 6:17 AM, scott wrote:
>> I know one kid at my school had a T-shirt that *changes* colour in
>> response to temperature...
>
> I had one of these!
>
> http://en.wikipedia.org/wiki/Hypercolor
>

I did, too... After a year or so, it lost its ability to change color, 
though. The thermochromic dye probably eventually washed out.

-- 
~Mike

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