There is probably no one who did not participate in a game blind man’s buff as a child, in which one is blindfolded and must catch one of the children around him. Everyone has experienced the feeling of insecurity when bumping into the objects. We are used to seeing everything that surrounds us. In this regard, nature has given sight to almost all living beings. The loss of sight makes life incomplete.

But there are always exceptions to the general rule. A bat can navigate with confidence in pitch darkness. No matter how fast it flies, it always dodges and bypasses obstacles. This ability of the bat remained a mystery for a long time. When science revealed the principles of work the bat’s organ of vision, an important step was taken to develop technology: a radar that sees flying objects thousands of kilometres away was invented.