The skin-ablation laser tattoo we showed you recently was creepy mainly because burning your naked skin is going to hurt, but this new laser body-mod tackles a safer target, fingernails. The portraits of famous bods you can see in the image are laser-etched into black nail polish (I know, it looks like they're made of seared, blackened nail, but they're not), and member lamedust over at Instructables has got a pretty comprehensive guide. So if you're crazy, you too can etch pics onto the end of your digits. The video makes for interesting watching.

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Scientists in the UK have thought differently about touchpad designs: their system peeks at your fingertips to see what you're touching. It can sense when you're pushing on something and how hard, so everything —even a 3D uneven surface— could be made into a touchpad. Quite why they chose to demo this with a purring rock we're not sure. But we like it.

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