Most of us spend our entire careers chasing the effect of itty bitty bacteria; just for the pure fun of it, check out this link to conceptualize the size of them, in the immortal words of Professor Mecklinger, “little buggers”.
http://learn.genetics.utah.edu/content/begin/cells/scale/
And if you thought dentistry had gone technologicified now, just wait…….http://gigaom.com/2012/01/12/ibms-builds-memory-chips-one-atom-at-a-time/
