Interesting take on the Khan Academy. Basically Khan Academy is a great idea for math/science but does it work for softer subjects (history)?

Scientists (who seem to be really smart, by the way) have figured out a way to take the bad fat that is inside pigs, and turn it into the good fat that is inside fish. Clearly, there are some further tests to be performed. No one wants mutant pigs running around killing people, and this seems to be..