Genetic information in all living things is stored in a substance known as DNA (deoxy-ribonucleic acid). This is a giant molecular structure built up of four small basic building blocks. The patterns created by the sequence of these building blocks define the actual genetic information. The DNA is organised into genes, each one defining a given attribute of the living organism. Genes are highly complex and interact with each other in a highly complex manner.
The Theory of Evolution relies of the concepts of genetic mutations (random changes to the structure of genes) and natural selection (survival of the fittest). For this to work the mutations would have to be of a constructive nature. In other words they would have to create new information in order to produce an increasing complexity of life forms. It is known that in practice almost any genetic mutation will be ineffective or even destructive (i.e. produce harmful results). Supporters of evolution argue that the process has succeeded merely because it has had such a vast amount of time to take place. Realistically, the laws of statistical probability are quite simply against it.
Consider an organ as complicated as an eye or an ear (let alone a human brain!). Such would take many thousands of separate genetic mutations to become perfected. For evolution to be successfully accomplished, every single step would have to survive and be favoured by the natural selection process. This is simply not going to be the case in practice.
Looking at the complexity of life on earth, it can surely only be the work of a super-intelligent creator!