I bet that when you saw this bot in the picture above, you thought that the suction cups it has are connected into a vacuum... Well, that's wrong. This bot utilizes the Bernoulli's principle to "stick" onto rough surfaces with gaps. It is made byt researchers at the University of Canterbury in New Zealand. It shoots air out of around these "suction cups" with extremely high velocity, more than 2000 miles per hour. This creates a reverse pressure that allows the cups hold the entire bot along with half a kilo of weight.