When you ’re in a strange city it ’s easy to get lose , but you do n’t want to leave out the sights because you ’re glued to a map or GPS equipment . German and Swedish investigator may have created a solution – a cubicle telephone that can give you GPS directions simply by heating up or cooling down the handset .
It uses a Peltier twist to change temperature – the warmer the unit , the more on - track you are , but take a wrong round and it will cool down . This curious feature film could also be used in other ways , like separate you how authoritative a call is – if it ’s your blistering girlfriend it could get toasty ardent to tell you to pick up , but if it ’s your foreman then it could ice up to tell you that it ’s best avoided . [ New Scientist ]
Handset
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