6 Strange Body Hacks That Are Actually Useful
The human body has the potential for amazing feats, but it also has built-in limitations — we can’t hear certain tones, we see a limited range of colors, and we can’t feel magnetic and electrical fields around us the way some animals do.
Some people choose not to accept those limits.
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Story added 20. August 2014, content source with full text you can find at link above.