For many years scientists are trying to indicate what the cause of autism is. A lot of research has been done and those researches gave us many theories about the roots of autism.
Autism is a condition, which results from the impairment of the brain and leads to generally reserved behavior and attitude to life. Autistic people lack communication and social interaction, have limited interests, and often resort ritualistic activities like repetitively placing objects in a fixed order. The disorder affects physical and mental abilities and sometimes makes life very tough for both patients and people around them. Autism begins to manifest itself at an early age, and symptoms continue into adulthood.