Explain the following statement photography has extended the limits of our vision

Photography has created a way of capturing memories ad seeing farther that the eye cannot. Photograph has extended the limits of vision by working as an eye that can see farther, capturing and keeping what it sees that's how its extended the limits of our vision. 

Clay is a good medium to sculpt because its shape can be changed easily

These traits are all equally important in recognizing the validity of artwork mainly due to an artists' consistent style and reputation which they have developed over a lengthy period of time. most famous paintings contain specific characteristics of the artist who created it. an appraiser would pay close attention to certain key elements within the painting, as well as an accuracy in measurement and color shade. blended textures and outlines are essential in recognizing an authentic piece from a copy. signature and imagery exist in epic proportions to balance out each trait as they coexist in harmony, depending on preference and style of each artist. no two original pieces are virtually identical, although it may be almost impossible to see discrepancy with the naked eye.