>> so the hypotenuse is now going to be five. this animal's fossils are only found in this area of south america. nice clean band here. and this part of africa. we could integrate over the surface in the no nation-- notation turbly is a capital sigma, national assembly, they create the committee of public safety. which sounds like a very nice committee. notice this is an aldahyde and an alcohol. >> into an effecter and memory sells. >> a gal ax there is another galaxy. >> and for dollars is there 30 million plus the 20 million from the american manufacturer. if this does not blow your mind, then you have no emotion. (cheers and applause) >> stephen: so that's not the most standard way of teaching i've ever seen. >> no, i mean i was doing for my cousins and you know, they weren't paying me so i just kind of do it very conversationally. they are feedback was that they liked me better on youtube than in person. >> stephen: . >> face does not appear t is just voice and writing. >> stephen: and do you happen to agree-- have a degree i