3 ms·
relevant link https://www.scientificamerican.com/article/crack-research/ https://www.scientificamerican.com/article/crack-research/ N=1; guy cracks just one ha
by epivosism 5y ago
relevant link https://www.scientificamerican.com/article/crack-research/ https://www.scientificamerican.com/article/crack-research/
N=1; guy cracks just one hand for years and reports results.