Surely, there have been many a time when you had to deal with a situation where you had no access to electricity and your mobile phone had gone dead. Naturally, the market offers power banks galore to save you from such emergencies, yet we often fail to remember to carry them with us. Besides, they are heavy, unwieldy, and also harmful to the environment.

The lens is an important element of the eye of mammals, birds, reptiles, amphibians, and fish. It allows one to see objects located at different distances clearly. It is possible because images are formed on the retina - another important part of the eye. Clear images are achieved by changes in the shape of the lens.

We are surrounded by the algorithms used in web browsers, shops, and advertisements that are sent to our social networks portals. We use them not only for our shopping choices, but also in making political decisions. Along with their creation and development, the hope to create a scientific, objective and free from prejudices world was revived.

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