at

The term to, whose plural is at, can be used in different contexts. The concept refers to extremities of which certain animals to lift flight and remain suspended in the air. There are species with wings, however, that are unable to fly because of some of their morphological characteristics.

In the insects, the wings usually arise from the thorax. There are species that have one pair of wings, although others have two pairs. The dragonflies, the flies and the bees they are examples of insects with wings.

The birds they also have wings, in this case usually covered with pens. The variety of wings in these animals is very wide: the swallows, the condors, the chickens, the penguins and the Eagles, to name a few species, they are all winged but they present many differences.

If we focus on mammals, the only species that has wings and is capable of flight is the bat. Their wings are formed by a skin membrane supported by the toes of the forelegs, with the exception of the thumb.

The wings are also the structures that allow the lift of certain aircraft, such as the planes. These wings obey the laws of aerodynamics and are essential for these vehicles to move around the air.

It goes without saying that aircraft wings are inspired by those of animals and insects, just as most human creations are based on the imitation of nature to elevate his possibilities beyond what it had in store for him. We should not fly, or swim so deep or for days and months, but that did not stop us from creating airplanes and boats, just two examples of the attitude of our species towards natural limitations.

There is various evidence that humans had dreamed of flying since the first time they saw a bird soar in the sky, and this takes us back to prehistory. Either through ancient myths and legends, among which we can discard the flight from the Greek Icarus, or from inventions that sought to stay in the air, something that geniuses like Leonardo da Vinci sought, it was already in our DNA to go beyond the surface of the Earth, and for that we needed wings.

Leonardo da Vinci had a special fascination for birds, and this can be seen in several of his creations, such as his ornithopters, a series of machines flying that he devised for the transport of several people, with one or two levels. Its various concepts included one in which the pilot had to stand and another in which he had to lie down to steer the aircraft.

Despite the vision ahead of its time of the great Italian inventor, ornithopters were not destined to take off, as they presented a fundamental flaw: his engine was the same pilot, and no human being can generate with his limbs the energy necessary to fly. The wings were designed in the image and likeness of the natural ones, but we must not forget that the birds They have hollow bones and therefore much lighter than ours, not to mention that they are born prepared to propel themselves into the air.

In the field of architecture, wings are called attached bodies which are located on the sides of the main construction, being separated from it. This idea can also be applied to other human products, to refer to any thin bumps located on the sides of the basic structure.

When wing is accentuated in the second TO (To), it is the Arabic word used to refer to God.