Evidences of evolution are all around us. due to meiotic mode of reproduction its ensured that there will be variations in the offsprings and only the phenotypic propertis that are most suitable for survival and development will be passed to the next geneartion. One remarkable evidence is seen in the evolution of apes. the fingers of the apes became longer with time and supplied with more nerve endings. this was because the apes used their hands to make and use tools. A theory predicts that in few centuries, evolution would cause the fingers of the apes to be more long and resemble tentacles because of their usage in operating touch screen devices and keyboards.