MIT’s newest robot, the Cheetah 3, is unlike any of its predecessors, as it can now easily leap, gallop across rough terrain, and even climb a staircase littered with debris. When suddenly yanked or shoved, it can quickly recover its balance, all the while essentially blind, thanks to new vision-free algorithms. “The contact detection algorithm helps the robot determine the best time to transition a leg between swing and step, by constantly calculating for each leg three probabilities: the probability of a leg making contact with the ground, the probability of the force generated once the leg hits the ground, and the probability that the leg will be in midswing. The algorithm calculates these probabilities based on data from gyroscopes, accelerometers, and joint positions of the legs, which record the leg’s angle and height with respect to the ground,” according to the researchers. Click here for the first image in today’s viral picture gallery. Continue reading for the five most popular viral videos today, including one of nine nut cracker gadgets you can actually buy.