Newsround Article - 4D printing

Channel Hopper

Suffering fools, so you don't have to.
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And to be honest, I'm still not sure what they are on about.

http://www.bbc.co.uk/newsround/32498842

Valves that close at a predefined temperature = thermostat. Nothing new there then.

Secret messages that vanish - Mission impossible tape and rice paper / acetic acid.

Etc.
 

Vipersan

Emmett Browns Ghost
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I think this one is exactly a month late...
May 1st today......
 
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