• Where did﻿ you get the minus?

• Yeah﻿ I know...

• I don't think all this is "lying" to kids... I just got done taking Physics (highschool) and all the stuff talked about in here are like... errors equal to 1x10^-37....which isn't very much...

Sure 2+1.99999999999999999999999999­9 isn't 4, but its pretty damn close to 4﻿ and for students who haven't had any prior physics education, assuming 2+1.999999999999999999999999=4 is much easier to understand than going through everything mentioned in this video.. just sayin~

• 0:10 Trololololololoololloololololo­lolol﻿

• 1+0=1 -.- u mean 1(0)=0 ﻿

• Surely Gravity is the bending of spacetime caused by objects with mass. The more massive the object the greater the effect as in gravitational lensing or﻿ black holes. So if I have this right, you are saying light can have an attraction or in other words a particle with zero mass can bend, however small, spacetime?

• Dude you just won a noble prize, 1 + 0 = 0..!!

r u﻿ stupid or something ?

• Please use the metric system when making videos, especially since you're﻿ a physicist.

• I just think light is a﻿ race of spacetravellers going WEEEEEEEEEEEEEEEEEEEEEEEEEEEEE­EEEEEEEEEEEEEEEEEEEEE through the solar systems.

• It just teaches us how much﻿ we don't know

• Excellent point.﻿

• 1+0=1... dumbshit..﻿