Some scientists decided to use their heads for something useful and came up with the exact amount of LEGO blocks that can be stacked on top of each other before the weight on the bottom piece became to much to and crashed it. Turns out to be about 3.5 kilometers. Not bad and more than my guess of 2.86 kms.
According to BBC Radio statistics program More or Less, engineers used a hydraulic testing machine to calculate the strength of one standard square Lego brick.
They were then able to exert more than 4,000 newtons (N) of force before the square gave out.
Now they need to figure out why stepping on a piece causes more pain than walking on hot coals.