Animal echolocation extremely narrow beams and many receivers to localize a target (multibeam sonar), animal echolocation has only one transmitter and two receivers (the ears) positioned slightly apart. The echoes returning to the ears arrive at different times and at different loudness levels, depending on the position of the object generating the echoes. The time and loudness differences are used by the animals to perceive distance and direction. With echolocation, the bat or other animal can see not only where it is going but also how big another animal is, what kind of animal it is, and other features.. At the most
Lady with an Ermine but a white ferret, a colour favoured in the Middle Ages because of the ease of seeing the white animal in thick undergrowth. As in many of Leonardo's paintings, the composition comprises a pyramidic spiral and the sitter is caught in the motion of turning to her left, reflecting Leonardo's lifelong preoccupation with the dynamics of movement. The three-quarter profile portrait was one of his many innovations. Il Moro's court poet, Bernardo Bellincioni, was the first to propose that Cecilia was poised as if listening to an unseen speaker. This work in particular shows Leonardo's expertise in painting the human