Miniaturization has no limits, specially when it comes to hi-tech gadgets. Remember the Whooping 5 MB hard disk that was made by IBM in 1956 weighed tons!! and now USBs have crossed GBs and entering to TBs. Like all other gadgets, here is the tinniest 2 MP HD camera ever that can just ..... well I leave it for you to decide how small it can be when you scroll down. This is amazing.
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