The experiment was double-blind-neither the subjects nor the scientists knew which liquid was which-a technique considered especially strong in research science.
But some analysts saw it as a stop-gap measure to avoid a looming crisis that some compared to that set off by the collapse of Lehman Brothers in 2008.
Such courses, Hacker argues, are a remedy for the numerical illiteracy of adults who have completed high-level math like algebra but are unable to calculate the price of a carpet by area.
Montgomery and the rest of the Smub team don't see the service as a stop-gap solution until smart phones get smarter, and they plan to add value across web and mobile interfaces.
Modern birds are direct descendants of Maniraptoran dinosaurs, experts say. The creatures that went extinct millions of years ago are now called "non-avian dinosaurs."