4 ms·
You can even wear a mask http://web.mit.edu/newsoffice/2013/seeing-the-human-pulse-0620.html http://web.mit.edu/newsoffice/2013/seeing-the-human-pulse-06...
by d0mine 13y ago
You can even wear a mask
http://web.mit.edu/newsoffice/2013/seeing-the-human-pulse-0620.html http://web.mit.edu/newsoffice/2013/seeing-the-human-pulse-06...