Unfolded Physics on Instagram: "On July 2, 2013, a massive Proton M rocket lifted off from a launch site in Russia and almost immediately something felt off. Just seconds into flight, engineers realized the rocket was veering in the wrong direction. The cause turned out to be shockingly simple. Three orientation sensors that tell the rocket which way is up had been installed upside down. Because of that, the rocket’s onboard computer was getting completely false information about its position. T